release 17.03-beta

.github/CODEOWNERS

@@ -1,23 +0,0 @@
-# CODEOWNERS file
-#
-# This file is used to describe who owns what in this repository. This file does not
-# replace `meta.maintainers` but is instead used for other things than derivations
-# and modules, like documentation, package sets, and other assets.
-#
-# For documentation on this file, see https://help.github.com/articles/about-codeowners/
-# Mentioned users will get code review requests.
-
-# Python-related code and docs
-pkgs/top-level/python-packages.nix	@FRidh
-pkgs/development/interpreters/python/*	@FRidh
-pkgs/development/python-modules/*	@FRidh
-doc/languages-frameworks/python.md	@FRidh
-
-# Boostraping and core infra
-pkgs/stdenv/	@Ericson2314
-pkgs/build-support/cc-wrapper/	@Ericson2314
-
-# Darwin-related
-pkgs/stdenv/darwin/*	@copumpkin @LnL7
-pkgs/os-specific/darwin/*	@LnL7
-pkgs/os-specific/darwin/apple-source-releases/*	@copumpkin

.github/CONTRIBUTING.md

@@ -15,7 +15,7 @@ under the terms of [COPYING](../COPYING), which is an MIT-like license.
 * Format the commits in the following way:
 
   ```
-  (pkg-name | nixos/<module>): (from -> to | init at version | refactor | etc)
+  (pkg-name | service-name): (from -> to | init at version | refactor | etc)
   
   (Motivation for change. Additional information.)
   ```
@@ -24,10 +24,10 @@ under the terms of [COPYING](../COPYING), which is an MIT-like license.
 
   * nginx: init at 2.0.1
   * firefox: 3.0 -> 3.1.1
-  * nixos/hydra: add bazBaz option
+  * hydra service: add bazBaz option
   
     Dual baz behavior is needed to do foo.
-  * nixos/nginx: refactor config generation
+  * nginx service: refactor config generation
     
     The old config generation system used impure shell scripts and could break in specific circumstances (see #1234).
 

.github/ISSUE_TEMPLATE.md

@@ -11,4 +11,3 @@
 * System: (NixOS: `nixos-version`, Ubuntu/Fedora: `lsb_release -a`, ...)
 * Nix version: (run `nix-env --version`)
 * Nixpkgs version: (run `nix-instantiate --eval '<nixpkgs>' -A lib.nixpkgsVersion`)
-* Sandboxing enabled: (run `grep build-use-sandbox /etc/nix/nix.conf`)

.github/PULL_REQUEST_TEMPLATE.md

@@ -3,8 +3,6 @@
 
 ###### Things done
 
-<!-- Please check what applies. Note that these are not hard requirements but merely serve as information for reviewers. -->
-
 - [ ] Tested using sandboxing
   ([nix.useSandbox](http://nixos.org/nixos/manual/options.html#opt-nix.useSandbox) on NixOS,
     or option `build-use-sandbox` in [`nix.conf`](http://nixos.org/nix/manual/#sec-conf-file)
@@ -13,7 +11,6 @@
    - [ ] NixOS
    - [ ] macOS
    - [ ] Linux
-- [ ] Tested via one or more NixOS test(s) if existing and applicable for the change (look inside [nixos/tests](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests))
 - [ ] Tested compilation of all pkgs that depend on this change using `nix-shell -p nox --run "nox-review wip"`
 - [ ] Tested execution of all binary files (usually in `./result/bin/`)
 - [ ] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md).

.mention-bot

@@ -0,0 +1,13 @@
+{
+  "userBlacklist": [
+    "civodul",
+    "jhasse",
+    "shlevy"
+  ],
+  "alwaysNotifyForPaths": [
+    { "name": "FRidh", "files": ["pkgs/top-level/python-packages.nix", "pkgs/development/interpreters/python/*", "pkgs/development/python-modules/*" ] },
+    { "name": "LnL7", "files": ["pkgs/stdenv/darwin/*", "pkgs/os-specific/darwin/*"] },
+    { "name": "copumpkin", "files": ["pkgs/stdenv/darwin/*", "pkgs/os-specific/darwin/apple-source-releases/*"] }
+  ],
+  "fileBlacklist": ["pkgs/top-level/all-packages.nix"]
+}

.travis.yml

@@ -1,35 +1,20 @@
 language: nix
-sudo: true
-# 'sudo: false' == containers that start fast, but only get 4G ram;
-# 'sudo: true'  == VMs that start slow, but with 8G
-# ..as per:  https://docs.travis-ci.com/user/ci-environment/#Virtualization-environments
-# Nixpkgs PR tests OOM with 4G: https://github.com/NixOS/nixpkgs/issues/24200
-
 matrix:
     include:
         - os: linux
-          sudo: required
+          sudo: false
           script:
               - ./maintainers/scripts/travis-nox-review-pr.sh nixpkgs-verify nixpkgs-manual nixpkgs-tarball nixpkgs-unstable
               - ./maintainers/scripts/travis-nox-review-pr.sh nixos-options nixos-manual
-          env:
-            - BUILD_TYPE="Test Nixpkgs evaluation & NixOS manual build"
         - os: linux
           sudo: required
           dist: trusty
           before_script:
               - sudo mount -o remount,exec,size=2G,mode=755 /run/user
           script: ./maintainers/scripts/travis-nox-review-pr.sh nox pr
-          env:
-            - BUILD_TYPE="Build affected packages (Linux)"
         - os: osx
           osx_image: xcode7.3
           script: ./maintainers/scripts/travis-nox-review-pr.sh nox pr
-          env:
-            - BUILD_TYPE="Build affected packages (macOS)"
 env:
     global:
         - GITHUB_TOKEN=5edaaf1017f691ed34e7f80878f8f5fbd071603f
-
-notifications:
-    email: false

.version

@@ -1 +1 @@
-17.09
+17.03

README.md

@@ -13,12 +13,12 @@ build daemon as so-called channels. To get channel information via git, add
 ```
 
 For stability and maximum binary package support, it is recommended to maintain
-custom changes on top of one of the channels, e.g. `nixos-17.03` for the latest
+custom changes on top of one of the channels, e.g. `nixos-16.09` for the latest
 release and `nixos-unstable` for the latest successful build of master:
 
 ```
 % git remote update channels
-% git rebase channels/nixos-17.03
+% git rebase channels/nixos-16.09
 ```
 
 For pull-requests, please rebase onto nixpkgs `master`.
@@ -32,11 +32,11 @@ For pull-requests, please rebase onto nixpkgs `master`.
 * [Manual (NixOS)](https://nixos.org/nixos/manual/)
 * [Nix Wiki](https://nixos.org/wiki/) (deprecated, see milestone ["Move the Wiki!"](https://github.com/NixOS/nixpkgs/issues?q=is%3Aopen+is%3Aissue+milestone%3A%22Move+the+wiki%21%22))
 * [Continuous package builds for unstable/master](https://hydra.nixos.org/jobset/nixos/trunk-combined)
-* [Continuous package builds for 17.03 release](https://hydra.nixos.org/jobset/nixos/release-17.03)
+* [Continuous package builds for 16.09 release](https://hydra.nixos.org/jobset/nixos/release-16.09)
 * [Tests for unstable/master](https://hydra.nixos.org/job/nixos/trunk-combined/tested#tabs-constituents)
-* [Tests for 17.03 release](https://hydra.nixos.org/job/nixos/release-17.03/tested#tabs-constituents)
+* [Tests for 16.09 release](https://hydra.nixos.org/job/nixos/release-16.09/tested#tabs-constituents)
 
 Communication:
 
-* [Mailing list](https://groups.google.com/forum/#!forum/nix-devel)
+* [Mailing list](http://lists.science.uu.nl/mailman/listinfo/nix-dev)
 * [IRC - #nixos on freenode.net](irc://irc.freenode.net/#nixos)

default.nix

@@ -2,17 +2,7 @@ let requiredVersion = import ./lib/minver.nix; in
 
 if ! builtins ? nixVersion || builtins.compareVersions requiredVersion builtins.nixVersion == 1 then
 
-  abort ''
-
-    This version of Nixpkgs requires Nix >= ${requiredVersion}, please upgrade:
-
-    - If you are running NixOS, use `nixos-rebuild' to upgrade your system.
-
-    - If you installed Nix using the install script (https://nixos.org/nix/install),
-      it is safe to upgrade by running it again:
-
-          curl https://nixos.org/nix/install | sh
-  ''
+  abort "This version of Nixpkgs requires Nix >= ${requiredVersion}, please upgrade! See https://nixos.org/wiki/How_to_update_when_Nix_is_too_old_to_evaluate_Nixpkgs"
 
 else
 

doc/coding-conventions.xml

@@ -254,7 +254,7 @@ bound to the variable name <varname>e2fsprogs</varname> in
   dash) — e.g., <literal>"hello-0.3.1rc2"</literal>.</para></listitem>
 
   <listitem><para>If a package is not a release but a commit from a repository, then
-  the version part of the name <emphasis>must</emphasis> be the date of that
+  the version part of the name <emphasis>must</emphasis> be the date of that 
   (fetched) commit. The date must be in <literal>"YYYY-MM-DD"</literal> format.
   Also append <literal>"unstable"</literal> to the name - e.g.,
   <literal>"pkgname-unstable-2014-09-23"</literal>.</para></listitem>
@@ -456,7 +456,7 @@ splitting up an existing category.</para>
   <varlistentry>
     <term>If it’s a <emphasis>window manager</emphasis>:</term>
     <listitem>
-      <para><filename>applications/window-managers</filename> (e.g. <filename>awesome</filename>, <filename>stumpwm</filename>)</para>
+      <para><filename>applications/window-managers</filename> (e.g. <filename>awesome</filename>, <filename>compiz</filename>, <filename>stumpwm</filename>)</para>
     </listitem>
   </varlistentry>
   <varlistentry>
@@ -661,9 +661,9 @@ src = fetchFromGitHub {
 </section>
 
 <section xml:id="sec-patches"><title>Patches</title>
-  <para>Only patches that are unique to <literal>nixpkgs</literal> should be
+  <para>Only patches that are unique to <literal>nixpkgs</literal> should be 
     included in <literal>nixpkgs</literal> source.</para>
-  <para>Patches available online should be retrieved using
+  <para>Patches available online should be retrieved using 
     <literal>fetchpatch</literal>.</para>
   <para>
 <programlisting>

doc/configuration.xml

@@ -227,7 +227,7 @@ packages via <literal>packageOverrides</literal></title>
 
 <para>You can define a function called
 <varname>packageOverrides</varname> in your local
-<filename>~/.config/nixpkgs/config.nix</filename> to override nix packages.  It
+<filename>~/.config/nixpkgs/config.nix</filename> to overide nix packages.  It
 must be a function that takes pkgs as an argument and return modified
 set of packages.
 
@@ -243,218 +243,5 @@ set of packages.
 
 </section>
 
-<section xml:id="sec-declarative-package-management">
-  <title>Declarative Package Management</title>
-
-  <section xml:id="sec-building-environment">
-    <title>Build an environment</title>
-
-    <para>
-      Using <literal>packageOverrides</literal>, it is possible to manage
-      packages declaratively. This means that we can list all of our desired
-      packages within a declarative Nix expression. For example, to have
-      <literal>aspell</literal>, <literal>bc</literal>,
-      <literal>ffmpeg</literal>, <literal>coreutils</literal>,
-      <literal>gdb</literal>, <literal>nixUnstable</literal>,
-      <literal>emscripten</literal>, <literal>jq</literal>,
-      <literal>nox</literal>, and <literal>silver-searcher</literal>, we could
-      use the following in <filename>~/.config/nixpkgs/config.nix</filename>:
-    </para>
-
-    <screen>
-{
-  packageOverrides = pkgs: with pkgs; {
-    myPackages = pkgs.buildEnv {
-      name = "my-packages";
-      paths = [ aspell bc coreutils gdb ffmpeg nixUnstable emscripten jq nox silver-searcher ];
-    };
-  };
-}
-    </screen>
-
-    <para>
-      To install it into our environment, you can just run <literal>nix-env -iA
-      nixpkgs.myPackages</literal>. If you want to load the packages to be built
-      from a working copy of <literal>nixpkgs</literal> you just run
-      <literal>nix-env -f. -iA myPackages</literal>. To explore what's been
-      installed, just look through <filename>~/.nix-profile/</filename>. You can
-      see that a lot of stuff has been installed. Some of this stuff is useful
-      some of it isn't. Let's tell Nixpkgs to only link the stuff that we want:
-    </para>
-
-    <screen>
-{
-  packageOverrides = pkgs: with pkgs; {
-    myPackages = pkgs.buildEnv {
-      name = "my-packages";
-      paths = [ aspell bc coreutils gdb ffmpeg nixUnstable emscripten jq nox silver-searcher ];
-      pathsToLink = [ "/share" "/bin" ];
-    };
-  };
-}
-    </screen>
-
-    <para>
-      <literal>pathsToLink</literal> tells Nixpkgs to only link the paths listed
-      which gets rid of the extra stuff in the profile.
-      <filename>/bin</filename> and <filename>/share</filename> are good
-      defaults for a user environment, getting rid of the clutter. If you are
-      running on Nix on MacOS, you may want to add another path as well,
-      <filename>/Applications</filename>, that makes GUI apps available.
-    </para>
-
-  </section>
-
-  <section xml:id="sec-getting-documentation">
-    <title>Getting documentation</title>
-
-    <para>
-      After building that new environment, look through
-      <filename>~/.nix-profile</filename> to make sure everything is there that
-      we wanted. Discerning readers will note that some files are missing. Look
-      inside <filename>~/.nix-profile/share/man/man1/</filename> to verify this.
-      There are no man pages for any of the Nix tools! This is because some
-      packages like Nix have multiple outputs for things like documentation (see
-      section 4). Let's make Nix install those as well.
-    </para>
-
-    <screen>
-{
-  packageOverrides = pkgs: with pkgs; {
-    myPackages = pkgs.buildEnv {
-      name = "my-packages";
-      paths = [ aspell bc coreutils ffmpeg nixUnstable emscripten jq nox silver-searcher ];
-      pathsToLink = [ "/share/man" "/share/doc" /bin" ];
-      extraOutputsToInstall = [ "man" "doc" ];
-    };
-  };
-}
-    </screen>
-
-    <para>
-      This provides us with some useful documentation for using our packages.
-      However, if we actually want those manpages to be detected by man, we need
-      to set up our environment. This can also be managed within Nix
-      expressions.
-    </para>
-
-    <screen>
-{
-  packageOverrides = pkgs: with pkgs; rec {
-    myProfile = writeText "my-profile" ''
-export PATH=$HOME/.nix-profile/bin:/nix/var/nix/profiles/default/bin:/sbin:/bin:/usr/sbin:/usr/bin
-export MANPATH=$HOME/.nix-profile/share/man:/nix/var/nix/profiles/default/share/man:/usr/share/man
-    '';
-    myPackages = pkgs.buildEnv {
-      name = "my-packages";
-      paths = [
-        (runCommand "profile" {} ''
-mkdir -p $out/etc/profile.d
-cp ${myProfile} $out/etc/profile.d/my-profile.sh
-        '')
-        aspell
-        bc
-        coreutils
-        ffmpeg
-        man
-        nixUnstable
-        emscripten
-        jq
-        nox
-        silver-searcher
-      ];
-      pathsToLink = [ "/share/man" "/share/doc" /bin" "/etc" ];
-      extraOutputsToInstall = [ "man" "doc" ];
-    };
-  };
-}
-    </screen>
-
-    <para>
-      For this to work fully, you must also have this script sourced when you
-      are logged in. Try adding something like this to your
-      <filename>~/.profile</filename> file:
-    </para>
-
-    <screen>
-#!/bin/sh
-if [ -d $HOME/.nix-profile/etc/profile.d ]; then
-  for i in $HOME/.nix-profile/etc/profile.d/*.sh; do
-    if [ -r $i ]; then
-      . $i
-    fi
-  done
-fi
-    </screen>
-
-    <para>
-      Now just run <literal>source $HOME/.profile</literal> and you can starting
-      loading man pages from your environent.
-    </para>
-
-  </section>
-    
-  <section xml:id="sec-gnu-info-setup">
-    <title>GNU info setup</title>
-
-    <para>
-      Configuring GNU info is a little bit trickier than man pages. To work
-      correctly, info needs a database to be generated. This can be done with
-      some small modifications to our environment scripts.
-    </para>
-
-    <screen>
-{
-  packageOverrides = pkgs: with pkgs; rec {
-    myProfile = writeText "my-profile" ''
-export PATH=$HOME/.nix-profile/bin:/nix/var/nix/profiles/default/bin:/sbin:/bin:/usr/sbin:/usr/bin
-export MANPATH=$HOME/.nix-profile/share/man:/nix/var/nix/profiles/default/share/man:/usr/share/man
-export INFOPATH=$HOME/.nix-profile/share/info:/nix/var/nix/profiles/default/share/info:/usr/share/info
-    '';
-    myPackages = pkgs.buildEnv {
-      name = "my-packages";
-      paths = [
-        (runCommand "profile" {} ''
-mkdir -p $out/etc/profile.d
-cp ${myProfile} $out/etc/profile.d/my-profile.sh
-        '')
-        aspell
-        bc
-        coreutils
-        ffmpeg
-        man
-        nixUnstable
-        emscripten
-        jq
-        nox
-        silver-searcher
-        texinfoInteractive
-      ];
-      pathsToLink = [ "/share/man" "/share/doc" "/share/info" "/bin" "/etc" ];
-      extraOutputsToInstall = [ "man" "doc" "info" ];
-      postBuild = ''
-          if [ -x $out/bin/install-info -a -w $out/share/info ]; then
-            shopt -s nullglob
-            for i in $out/share/info/*.info $out/share/info/*.info.gz; do
-                $out/bin/install-info $i $out/share/info/dir
-            done
-          fi
-      '';
-    };
-  };
-}
-    </screen>
-
-    <para>
-      <literal>postBuild</literal> tells Nixpkgs to run a command after building
-      the environment. In this case, <literal>install-info</literal> adds the
-      installed info pages to <literal>dir</literal> which is GNU info's default
-      root node. Note that <literal>texinfoInteractive</literal> is added to the
-      environment to give the <literal>install-info</literal> command.
-    </para>
-
-  </section>
-
-</section>
 
 </chapter>

doc/cross-compilation.xml

@@ -30,17 +30,23 @@
   <section>
     <title>Platform parameters</title>
     <para>
-      The three GNU Autoconf platforms, <wordasword>build</wordasword>, <wordasword>host</wordasword>, and <wordasword>target</wordasword>, are historically the result of much confusion.
+      The three GNU Autoconf platforms, <wordasword>build</wordasword>, <wordasword>host</wordasword>, and <wordasword>cross</wordasword>, are historically the result of much confusion.
       <link xlink:href="https://gcc.gnu.org/onlinedocs/gccint/Configure-Terms.html" /> clears this up somewhat but there is more to be said.
       An important advice to get out the way is, unless you are packaging a compiler or other build tool, just worry about the build and host platforms.
       Dealing with just two platforms usually better matches people's preconceptions, and in this case is completely correct.
     </para>
     <para>
       In Nixpkgs, these three platforms are defined as attribute sets under the names <literal>buildPlatform</literal>, <literal>hostPlatform</literal>, and <literal>targetPlatform</literal>.
-      All three are always defined as attributes in the standard environment, and at the top level. That means one can get at them just like a dependency in a function that is imported with <literal>callPackage</literal>:
-      <programlisting>{ stdenv, buildPlatform, hostPlatform, fooDep, barDep, .. }: ...buildPlatform...</programlisting>, or just off <varname>stdenv</varname>:
-      <programlisting>{ stdenv, fooDep, barDep, .. }: ...stdenv.buildPlatform...</programlisting>.
+      All are guaranteed to contain at least a <varname>platform</varname> field, which contains detailed information on the platform.
+      All three are always defined at the top level, so one can get at them just like a dependency in a function that is imported with <literal>callPackage</literal>:
+      <programlisting>{ stdenv, buildPlatform, hostPlatform, fooDep, barDep, .. }: ...</programlisting>
     </para>
+    <warning><para>
+      These platforms should all have the same structure in all scenarios, but that is currently not the case.
+      When not cross-compiling, they will each contain a <literal>system</literal> field with a short 2-part, hyphen-separated summering string name for the platform.
+      But, when when cross compiling, <literal>hostPlatform</literal> and <literal>targetPlatform</literal> may instead contain <literal>config</literal> with a fuller 3- or 4-part string in the manner of LLVM.
+      We should have all 3 platforms always contain both, and maybe give <literal>config</literal> a better name while we are at it.
+    </para></warning>
     <variablelist>
       <varlistentry>
         <term><varname>buildPlatform</varname></term>
@@ -63,8 +69,8 @@
             The "target platform" is black sheep.
             The other two intrinsically apply to all compiled software—or any build process with a notion of "build-time" followed by "run-time".
             The target platform only applies to programming tools, and even then only is a good for for some of them.
-            Briefly, GCC, Binutils, GHC, and certain other tools are written in such a way such that a single build can only compile code for a single platform.
-            Thus, when building them, one must think ahead about which platforms they wish to use the tool to produce machine code for, and build binaries for each.
+            Briefly, GCC, Binutils, GHC, and certain other tools are written in such a way such that a single build can only compiler code for a single platform.
+            Thus, when building them, one must think ahead about what platforms they wish to use the tool to produce machine code for, and build binaries for each.
           </para>
           <para>
             There is no fundamental need to think about the target ahead of time like this.
@@ -77,79 +83,14 @@
             Nixpkgs tries to avoid this where possible too, but still, because the concept of a target platform is so ingrained now in Autoconf and other tools, it is best to support it as is.
             Tools like LLVM that don't need up-front target platforms can safely ignore it like normal packages, and it will do no harm.
           </para>
-        </listitem>
-      </varlistentry>
-    </variablelist>
-    <para>
-      The exact schema these fields follow is a bit ill-defined due to a long and convoluted evolution, but this is slowly being cleaned up.
-      You can see examples of ones used in practice in <literal>lib.systems.examples</literal>; note how they are not all very consistent.
-      For now, here are few fields can count on them containing:
-    </para>
-    <variablelist>
-      <varlistentry>
-        <term><varname>system</varname></term>
-        <listitem>
-          <para>
-            This is a two-component shorthand for the platform.
-            Examples of this would be "x86_64-darwin" and "i686-linux"; see <literal>lib.systems.doubles</literal> for more.
-            This format isn't very standard, but has built-in support in Nix, such as the <varname>builtins.currentSystem</varname> impure string.
-          </para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><varname>config</varname></term>
-        <listitem>
-          <para>
-            This is a 3- or 4- component shorthand for the platform.
-            Examples of this would be "x86_64-unknown-linux-gnu" and "aarch64-apple-darwin14".
-            This is a standard format called the "LLVM target triple", as they are pioneered by LLVM and traditionally just used for the <varname>targetPlatform</varname>.
-            This format is strictly more informative than the "Nix host double", as the previous format could analogously be termed.
-            This needs a better name than <varname>config</varname>!
-          </para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><varname>parsed</varname></term>
-        <listitem>
-          <para>
-            This is a nix representation of a parsed LLVM target triple with white-listed components.
-            This can be specified directly, or actually parsed from the <varname>config</varname>.
-            [Technically, only one need be specified and the others can be inferred, though the precision of inference may not be very good.]
-            See <literal>lib.systems.parse</literal> for the exact representation.
-          </para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><varname>libc</varname></term>
-        <listitem>
-          <para>
-            This is a string identifying the standard C library used.
-            Valid identifiers include "glibc" for GNU libc, "libSystem" for Darwin's Libsystem, and "uclibc" for µClibc.
-            It should probably be refactored to use the module system, like <varname>parse</varname>.
-          </para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><varname>is*</varname></term>
-        <listitem>
-          <para>
-            These predicates are defined in <literal>lib.systems.inspect</literal>, and slapped on every platform.
-            They are superior to the ones in <varname>stdenv</varname> as they force the user to be explicit about which platform they are inspecting.
-            Please use these instead of those.
-          </para>
-        </listitem>
-      </varlistentry>
-      <varlistentry>
-        <term><varname>platform</varname></term>
-        <listitem>
-          <para>
-            This is, quite frankly, a dumping ground of ad-hoc settings (it's an attribute set).
-            See <literal>lib.systems.platforms</literal> for examples—there's hopefully one in there that will work verbatim for each platform that is working.
-            Please help us triage these flags and give them better homes!
-          </para>
-        </listitem>
+          </listitem>
       </varlistentry>
     </variablelist>
+    <note><para>
+      If you dig around nixpkgs, you may notice there is also <varname>stdenv.cross</varname>.
+      This field defined as <varname>hostPlatform</varname> when the host and build platforms differ, but otherwise not defined at all.
+      This field is obsolete and will soon disappear—please do not use it.
+    </para></note>
   </section>
 
   <section>
@@ -174,20 +115,15 @@
       The depending package's target platform is unconstrained by the sliding window principle, which makes sense in that one can in principle build cross compilers targeting arbitrary platforms.
     </para></note>
     <para>
-      How does this work in practice? Nixpkgs is now structured so that build-time dependencies are taken from <varname>buildPackages</varname>, whereas run-time dependencies are taken from the top level attribute set.
+      How does this work in practice? Nixpkgs is now structured so that build-time dependencies are taken from from <varname>buildPackages</varname>, whereas run-time dependencies are taken from the top level attribute set.
       For example, <varname>buildPackages.gcc</varname> should be used at build time, while <varname>gcc</varname> should be used at run time.
       Now, for most of Nixpkgs's history, there was no <varname>buildPackages</varname>, and most packages have not been refactored to use it explicitly.
-      Instead, one can use the four attributes used for specifying dependencies as documented in <xref linkend="ssec-stdenv-attributes"/>.
+      Instead, one can use the four attributes used for specifying dependencies as documented in <link linkend="ssec-stdenv-attributes" />.
       We "splice" together the run-time and build-time package sets with <varname>callPackage</varname>, and then <varname>mkDerivation</varname> for each of four attributes pulls the right derivation out.
       This splicing can be skipped when not cross compiling as the package sets are the same, but is a bit slow for cross compiling.
       Because of this, a best-of-both-worlds solution is in the works with no splicing or explicit access of <varname>buildPackages</varname> needed.
       For now, feel free to use either method.
     </para>
-    <note><para>
-      There is also a "backlink" <varname>__targetPackages</varname>, yielding a package set whose <varname>buildPackages</varname> is the current package set.
-      This is a hack, though, to accommodate compilers with lousy build systems.
-      Please do not use this unless you are absolutely sure you are packaging such a compiler and there is no other way.
-    </para></note>
   </section>
 
 </section>
@@ -200,27 +136,11 @@
     More information needs to moved from the old wiki, especially <link xlink:href="https://nixos.org/wiki/CrossCompiling" />, for this section.
   </para></note>
   <para>
-    Nixpkgs can be instantiated with <varname>localSystem</varname> alone, in which case there is no cross compiling and everything is built by and for that system,
-    or also with <varname>crossSystem</varname>, in which case packages run on the latter, but all building happens on the former.
-    Both parameters take the same schema as the 3 (build, host, and target) platforms defined in the previous section.
-    As mentioned above, <literal>lib.systems.examples</literal> has some platforms which are used as arguments for these parameters in practice.
-    You can use them programmatically, or on the command line like <command>nix-build &lt;nixpkgs&gt; --arg crossSystem '(import &lt;nixpkgs/lib&gt;).systems.examples.fooBarBaz'</command>.
+    Many sources (manual, wiki, etc) probably mention passing <varname>system</varname>, <varname>platform</varname>, and, optionally, <varname>crossSystem</varname> to nixpkgs:
+    <literal>import &lt;nixpkgs&gt; { system = ..; platform = ..; crossSystem = ..; }</literal>.
+    <varname>system</varname> and <varname>platform</varname> together determine the system on which packages are built, and <varname>crossSystem</varname> specifies the platform on which packages are ultimately intended to run, if it is different.
+    This still works, but with more recent changes, one can alternatively pass <varname>localSystem</varname>, containing <varname>system</varname> and <varname>platform</varname>, for symmetry.
   </para>
-  <para>
-    While one is free to pass both parameters in full, there's a lot of logic to fill in missing fields.
-    As discussed in the previous section, only one of <varname>system</varname>, <varname>config</varname>, and <varname>parsed</varname> is needed to infer the other two.
-    Additionally, <varname>libc</varname> will be inferred from <varname>parse</varname>.
-    Finally, <literal>localSystem.system</literal> is also <emphasis>impurely</emphasis> inferred based on the platform evaluation occurs.
-    This means it is often not necessary to pass <varname>localSystem</varname> at all, as in the command-line example in the previous paragraph.
-  </para>
-  <note>
-    <para>
-      Many sources (manual, wiki, etc) probably mention passing <varname>system</varname>, <varname>platform</varname>, along with the optional <varname>crossSystem</varname> to nixpkgs:
-      <literal>import &lt;nixpkgs&gt; { system = ..; platform = ..; crossSystem = ..; }</literal>.
-      Passing those two instead of <varname>localSystem</varname> is still supported for compatibility, but is discouraged.
-      Indeed, much of the inference we do for these parameters is motivated by compatibility as much as convenience.
-    </para>
-  </note>
   <para>
     One would think that <varname>localSystem</varname> and <varname>crossSystem</varname> overlap horribly with the three <varname>*Platforms</varname> (<varname>buildPlatform</varname>, <varname>hostPlatform,</varname> and <varname>targetPlatform</varname>; see <varname>stage.nix</varname> or the manual).
     Actually, those identifiers are purposefully not used here to draw a subtle but important distinction:

doc/default.nix

@@ -26,7 +26,7 @@ pkgs.stdenv.mkDerivation {
       extraHeader = ''xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" '';
     in ''
       {
-        pandoc '${inputFile}' -w docbook ${lib.optionalString useChapters "--top-level-division=chapter"} \
+        pandoc '${inputFile}' -w docbook ${lib.optionalString useChapters "--chapters"} \
           --smart \
           | sed -e 's|<ulink url=|<link xlink:href=|' \
               -e 's|</ulink>|</link>|' \
@@ -68,10 +68,6 @@ pkgs.stdenv.mkDerivation {
       inputFile = ../pkgs/development/r-modules/README.md;
       outputFile = "languages-frameworks/r.xml";
     }
-  + toDocbook {
-      inputFile = ./languages-frameworks/rust.md;
-      outputFile = "./languages-frameworks/rust.xml";
-    }
   + toDocbook {
       inputFile = ./languages-frameworks/vim.md;
       outputFile = "./languages-frameworks/vim.xml";

doc/functions.xml

@@ -70,7 +70,7 @@
 
     <para>
       In the above example, the <varname>separateDebugInfo</varname> attribute is
-      overridden to be true, thus building debug info for
+      overriden to be true, thus building debug info for
       <varname>helloWithDebug</varname>, while all other attributes will be
       retained from the original <varname>hello</varname> package.
     </para>
@@ -358,8 +358,8 @@
 <para>
   <varname>pkgs.dockerTools</varname> is a set of functions for creating and
   manipulating Docker images according to the
-  <link xlink:href="https://github.com/moby/moby/blob/master/image/spec/v1.2.md#docker-image-specification-v120">
-  Docker Image Specification v1.2.0
+  <link xlink:href="https://github.com/docker/docker/blob/master/image/spec/v1.md#docker-image-specification-v100">
+  Docker Image Specification v1.0.0
   </link>. Docker itself is not used to perform any of the operations done by these
   functions.
 </para>
@@ -493,8 +493,8 @@
     <varname>config</varname> is used to specify the configuration of the
     containers that will be started off the built image in Docker.
     The available options are listed in the
-    <link xlink:href="https://github.com/moby/moby/blob/master/image/spec/v1.2.md#image-json-field-descriptions">
-      Docker Image Specification v1.2.0
+    <link xlink:href="https://github.com/docker/docker/blob/master/image/spec/v1.md#container-runconfig-field-descriptions">
+      Docker Image Specification v1.0.0
     </link>.
     </para>
   </callout>
@@ -529,7 +529,7 @@
   <note>
   <para>
   If you see errors similar to <literal>getProtocolByName: does not exist (no such protocol name: tcp)</literal>
-  you may need to add <literal>pkgs.iana-etc</literal> to <varname>contents</varname>.
+  you may need to add <literal>pkgs.iana_etc</literal> to <varname>contents</varname>.
   </para>
   </note>
 

doc/languages-frameworks/beam.xml

@@ -2,120 +2,60 @@
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xml:id="sec-beam">
 
-  <title>BEAM Languages (Erlang, Elixir &amp; LFE)</title>
+  <title>Beam Languages (Erlang &amp; Elixir)</title>
   <section xml:id="beam-introduction">
     <title>Introduction</title>
     <para>
-      In this document and related Nix expressions, we use the term,
-      <emphasis>BEAM</emphasis>, to describe the environment. BEAM is the name
-      of the Erlang Virtual Machine and, as far as we're concerned, from a
-      packaging perspective, all languages that run on the BEAM are
-      interchangeable. That which varies, like the build system, is transparent
-      to users of any given BEAM package, so we make no distinction.
+      In this document and related Nix expressions we use the term
+      <emphasis>Beam</emphasis> to describe the environment. Beam is
+      the name of the Erlang Virtial Machine and, as far as we know,
+      from a packaging perspective all languages that run on Beam are
+      interchangable. The things that do change, like the build
+      system, are transperant to the users of the package. So we make
+      no distinction.
     </para>
   </section>
-  <section xml:id="beam-structure">
-    <title>Structure</title>
-    <para>
-      All BEAM-related expressions are available via the top-level
-      <literal>beam</literal> attribute, which includes:
-    </para>
-    <itemizedlist>
-      <listitem>
-        <para>
-          <literal>interpreters</literal>: a set of compilers running on the
-          BEAM, including multiple Erlang/OTP versions
-          (<literal>beam.interpreters.erlangR19</literal>, etc), Elixir
-          (<literal>beam.interpreters.elixir</literal>) and LFE
-          (<literal>beam.interpreters.lfe</literal>).
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          <literal>packages</literal>: a set of package sets, each compiled with
-          a specific Erlang/OTP version, e.g.
-          <literal>beam.packages.erlangR19</literal>.
-        </para>
-      </listitem>
-    </itemizedlist>
-    <para>
-      The default Erlang compiler, defined by
-      <literal>beam.interpreters.erlang</literal>, is aliased as
-      <literal>erlang</literal>. The default BEAM package set is defined by
-      <literal>beam.packages.erlang</literal> and aliased at the top level as
-      <literal>beamPackages</literal>.
-    </para>
-    <para>
-      To create a package set built with a custom Erlang version, use the
-      lambda, <literal>beam.packagesWith</literal>, which accepts an Erlang/OTP
-      derivation and produces a package set similar to
-      <literal>beam.packages.erlang</literal>.
-    </para>
-    <para>
-      Many Erlang/OTP distributions available in
-      <literal>beam.interpreters</literal> have versions with ODBC and/or Java
-      enabled. For example, there's
-      <literal>beam.interpreters.erlangR19_odbc_javac</literal>, which
-      corresponds to <literal>beam.interpreters.erlangR19</literal>.
-    </para>
-    <para xml:id="erlang-call-package">
-      We also provide the lambda,
-      <literal>beam.packages.erlang.callPackage</literal>, which simplifies
-      writing BEAM package definitions by injecting all packages from
-      <literal>beam.packages.erlang</literal> into the top-level context.
-    </para>
-  </section>
-  <section xml:id="build-tools">
+<section xml:id="build-tools">
   <title>Build Tools</title>
   <section xml:id="build-tools-rebar3">
     <title>Rebar3</title>
     <para>
-      By default, Rebar3 wants to manage its own dependencies. This is perfectly
-      acceptable in the normal, non-Nix setup, but in the Nix world, it is not.
-      To rectify this, we provide two versions of Rebar3:
-      <itemizedlist>
-        <listitem>
-          <para>
-            <literal>rebar3</literal>: patched to remove the ability to download
-            anything. When not running it via <literal>nix-shell</literal> or
-            <literal>nix-build</literal>, it's probably not going to work as
-            desired.
-          </para>
-        </listitem>
-        <listitem>
-          <para>
-            <literal>rebar3-open</literal>: the normal, unmodified Rebar3. It
-            should work exactly as would any other version of Rebar3. Any Erlang
-            package should rely on <literal>rebar3</literal> instead. See <xref
-            linkend="rebar3-packages"/>.
-          </para>
-        </listitem>
-      </itemizedlist>
+      By default Rebar3 wants to manage it's own dependencies. In the
+      normal non-Nix, this is perfectly acceptable. In the Nix world it
+      is not. To support this we have created two versions of rebar3,
+      <literal>rebar3</literal> and <literal>rebar3-open</literal>. The
+      <literal>rebar3</literal> version has been patched to remove the
+      ability to download anything from it. If you are not running it a
+      nix-shell or a nix-build then its probably not going to work for
+      you. <literal>rebar3-open</literal> is the normal, un-modified
+      rebar3. It should work exactly as would any other version of
+      rebar3. Any Erlang package should rely on
+      <literal>rebar3</literal> and thats really what you should be
+      using too.
     </para>
   </section>
   <section xml:id="build-tools-other">
     <title>Mix &amp; Erlang.mk</title>
     <para>
-      Both Mix and Erlang.mk work exactly as expected. There is a bootstrap
-      process that needs to be run for both, however, which is supported by the
-      <literal>buildMix</literal> and <literal>buildErlangMk</literal>
-      derivations, respectively.
+      Both Mix and Erlang.mk work exactly as you would expect. There
+      is a bootstrap process that needs to be run for both of
+      them. However, that is supported by the
+      <literal>buildMix</literal> and <literal>buildErlangMk</literal> derivations.
     </para>
   </section>
+
 </section>
 
 <section xml:id="how-to-install-beam-packages">
-  <title>How to Install BEAM Packages</title>
+  <title>How to install Beam packages</title>
   <para>
-    BEAM packages are not registered at the top level, simply because they are
-    not relevant to the vast majority of Nix users. They are installable using
-    the <literal>beam.packages.erlang</literal> attribute set (aliased as
-    <literal>beamPackages</literal>), which points to packages built by the
-    default Erlang/OTP version in Nixpkgs, as defined by
-    <literal>beam.interpreters.erlang</literal>.
+    Beam packages are not registered in the top level simply because
+    they are not relevant to the vast majority of Nix users. They are
+    installable using the <literal>beamPackages</literal> attribute
+    set.
 
-    To list the available packages in
-    <literal>beamPackages</literal>, use the following command:
+    You can list the avialable packages in the
+    <literal>beamPackages</literal> with the following command:
   </para>
 
   <programlisting>
@@ -129,152 +69,115 @@ beamPackages.meck       meck-0.8.3
 beamPackages.rebar3-pc  pc-1.1.0
   </programlisting>
   <para>
-    To install any of those packages into your profile, refer to them by their
-    attribute path (first column):
+    To install any of those packages into your profile, refer to them by
+    their attribute path (first column):
   </para>
   <programlisting>
 $ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -iA beamPackages.ibrowse
   </programlisting>
   <para>
-    The attribute path of any BEAM package corresponds to the name of that
-    particular package in <link xlink:href="https://hex.pm">Hex</link> or its
-    OTP Application/Release name.
+    The attribute path of any Beam packages corresponds to the name
+    of that particular package in Hex or its OTP Application/Release name.
   </para>
 </section>
 <section xml:id="packaging-beam-applications">
-  <title>Packaging BEAM Applications</title>
+  <title>Packaging Beam Applications</title>
   <section  xml:id="packaging-erlang-applications">
     <title>Erlang Applications</title>
     <section xml:id="rebar3-packages">
       <title>Rebar3 Packages</title>
       <para>
-        The Nix function, <literal>buildRebar3</literal>, defined in
-        <literal>beam.packages.erlang.buildRebar3</literal> and aliased at the
-        top level, can be used to build a derivation that understands how to
-        build a Rebar3 project. For example, we can build <link
-        xlink:href="https://github.com/erlang-nix/hex2nix">hex2nix</link> as
-        follows:
+        There is a Nix functional called
+        <literal>buildRebar3</literal>. We use this function to make a
+        derivation that understands how to build the rebar3 project. For
+        example, the epression we use to build the <link
+        xlink:href="https://github.com/erlang-nix/hex2nix">hex2nix</link>
+        project follows.
       </para>
       <programlisting>
-        { stdenv, fetchFromGitHub, buildRebar3, ibrowse, jsx, erlware_commons }:
+        {stdenv, fetchFromGitHub, buildRebar3, ibrowse, jsx, erlware_commons }:
 
-        buildRebar3 rec {
-          name = "hex2nix";
-          version = "0.0.1";
+          buildRebar3 rec {
+            name = "hex2nix";
+            version = "0.0.1";
 
-          src = fetchFromGitHub {
-            owner = "ericbmerritt";
-            repo = "hex2nix";
-            rev = "${version}";
-            sha256 = "1w7xjidz1l5yjmhlplfx7kphmnpvqm67w99hd2m7kdixwdxq0zqg";
-          };
+            src = fetchFromGitHub {
+              owner = "ericbmerritt";
+              repo = "hex2nix";
+              rev = "${version}";
+              sha256 = "1w7xjidz1l5yjmhlplfx7kphmnpvqm67w99hd2m7kdixwdxq0zqg";
+            };
 
           beamDeps = [ ibrowse jsx erlware_commons ];
         }
       </programlisting>
       <para>
-        Such derivations are callable with
-        <literal>beam.packages.erlang.callPackage</literal> (see <xref
-        linkend="erlang-call-package"/>). To call this package using the normal
-        <literal>callPackage</literal>, refer to dependency packages via
-        <literal>beamPackages</literal>, e.g.
-        <literal>beamPackages.ibrowse</literal>.
+        The only visible difference between this derivation and
+        something like <literal>stdenv.mkDerivation</literal> is that we
+        have added <literal>erlangDeps</literal> to the derivation. If
+        you add your Beam dependencies here they will be correctly
+        handled by the system.
       </para>
       <para>
-        Notably, <literal>buildRebar3</literal> includes
-        <literal>beamDeps</literal>, while
-        <literal>stdenv.mkDerivation</literal> does not. BEAM dependencies added
-        there will be correctly handled by the system.
-      </para>
-      <para>
-        If a package needs to compile native code via Rebar3's port compilation
-        mechanism, add <literal>compilePort = true;</literal> to the derivation.
+        If your package needs to compile native code via Rebar's port
+        compilation mechenism. You should add <literal>compilePort =
+        true;</literal> to the derivation.
       </para>
     </section>
     <section xml:id="erlang-mk-packages">
       <title>Erlang.mk Packages</title>
       <para>
-        Erlang.mk functions similarly to Rebar3, except we use
-        <literal>buildErlangMk</literal> instead of
-        <literal>buildRebar3</literal>.
+        Erlang.mk functions almost identically to Rebar. The only real
+        difference is that <literal>buildErlangMk</literal> is called
+        instead of <literal>buildRebar3</literal>
       </para>
       <programlisting>
-        { buildErlangMk, fetchHex, cowlib, ranch }:
-
-        buildErlangMk {
-          name = "cowboy";
-          version = "1.0.4";
-
-          src = fetchHex {
-            pkg = "cowboy";
+        { buildErlangMk, fetchHex,  cowlib, ranch }:
+          buildErlangMk {
+            name = "cowboy";
             version = "1.0.4";
-            sha256 = "6a0edee96885fae3a8dd0ac1f333538a42e807db638a9453064ccfdaa6b9fdac";
-          };
+            src = fetchHex {
+              pkg = "cowboy";
+              version = "1.0.4";
+              sha256 =
+                "6a0edee96885fae3a8dd0ac1f333538a42e807db638a9453064ccfdaa6b9fdac";
+            };
+            beamDeps  = [ cowlib ranch ];
 
-          beamDeps = [ cowlib ranch ];
-
-          meta = {
-            description = ''
-              Small, fast, modular HTTP server written in Erlang
-            '';
-            license = stdenv.lib.licenses.isc;
-            homepage = https://github.com/ninenines/cowboy;
-          };
+            meta = {
+              description = ''Small, fast, modular HTTP server written in
+                            Erlang.'';
+              license = stdenv.lib.licenses.isc;
+              homepage = "https://github.com/ninenines/cowboy";
+            };
         }
       </programlisting>
     </section>
     <section xml:id="mix-packages">
       <title>Mix Packages</title>
       <para>
-        Mix functions similarly to Rebar3, except we use
-        <literal>buildMix</literal> instead of <literal>buildRebar3</literal>.
+        Mix functions almost identically to Rebar. The only real
+        difference is that <literal>buildMix</literal> is called
+        instead of <literal>buildRebar3</literal>
       </para>
       <programlisting>
         { buildMix, fetchHex, plug, absinthe }:
-
         buildMix {
           name = "absinthe_plug";
           version = "1.0.0";
-
           src = fetchHex {
             pkg = "absinthe_plug";
             version = "1.0.0";
-            sha256 = "08459823fe1fd4f0325a8bf0c937a4520583a5a26d73b193040ab30a1dfc0b33";
+            sha256 =
+              "08459823fe1fd4f0325a8bf0c937a4520583a5a26d73b193040ab30a1dfc0b33";
           };
-
-          beamDeps = [ plug absinthe ];
+          beamDeps  = [ plug absinthe];
 
           meta = {
-            description = ''
-              A plug for Absinthe, an experimental GraphQL toolkit
-            '';
+            description = ''A plug for Absinthe, an experimental GraphQL
+                            toolkit'';
             license = stdenv.lib.licenses.bsd3;
-            homepage = https://github.com/CargoSense/absinthe_plug;
-          };
-        }
-      </programlisting>
-      <para>
-        Alternatively, we can use <literal>buildHex</literal> as a shortcut:
-      </para>
-      <programlisting>
-        { buildHex, buildMix, plug, absinthe }:
-
-        buildHex {
-          name = "absinthe_plug";
-          version = "1.0.0";
-
-          sha256 = "08459823fe1fd4f0325a8bf0c937a4520583a5a26d73b193040ab30a1dfc0b33";
-
-          builder = buildMix;
-
-          beamDeps = [ plug absinthe ];
-
-          meta = {
-            description = ''
-              A plug for Absinthe, an experimental GraphQL toolkit
-            '';
-            license = stdenv.lib.licenses.bsd3;
-            homepage = https://github.com/CargoSense/absinthe_plug;
+            homepage = "https://github.com/CargoSense/absinthe_plug";
          };
        }
       </programlisting>
@@ -282,18 +185,18 @@ $ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -iA beamPackages.ibrowse
   </section>
 </section>
 <section xml:id="how-to-develop">
-  <title>How to Develop</title>
+  <title>How to develop</title>
   <section xml:id="accessing-an-environment">
     <title>Accessing an Environment</title>
     <para>
-      Often, we simply want to access a valid environment that contains a
-      specific package and its dependencies. We can accomplish that with the
-      <literal>env</literal> attribute of a derivation. For example, let's say
-      we want to access an Erlang REPL with <literal>ibrowse</literal> loaded
-      up. We could do the following:
+      Often, all you want to do is be able to access a valid
+      environment that contains a specific package and its
+      dependencies. we can do that with the <literal>env</literal>
+      part of a derivation. For example, lets say we want to access an
+      erlang repl with ibrowse loaded up. We could do the following.
     </para>
     <programlisting>
-      $ nix-shell -A beamPackages.ibrowse.env --run "erl"
+      ~/w/nixpkgs ❯❯❯ nix-shell -A beamPackages.ibrowse.env --run "erl"
       Erlang/OTP 18 [erts-7.0] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]
 
       Eshell V7.0  (abort with ^G)
@@ -334,19 +237,20 @@ $ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -iA beamPackages.ibrowse
       2>
     </programlisting>
     <para>
-      Notice the <literal>-A beamPackages.ibrowse.env</literal>. That is the key
-      to this functionality.
+      Notice the <literal>-A beamPackages.ibrowse.env</literal>.That
+      is the key to this functionality.
     </para>
   </section>
   <section xml:id="creating-a-shell">
     <title>Creating a Shell</title>
     <para>
       Getting access to an environment often isn't enough to do real
-      development. Usually, we need to create a <literal>shell.nix</literal>
-      file and do our development inside of the environment specified therein.
-      This file looks a lot like the packaging described above, except that
-      <literal>src</literal> points to the project root and we call the package
-      directly.
+      development. Many times we need to create a
+      <literal>shell.nix</literal> file and do our development inside
+      of the environment specified by that file. This file looks a lot
+      like the packaging described above. The main difference is that
+      <literal>src</literal> points to project root and we call the
+      package directly.
     </para>
     <programlisting>
 { pkgs ? import &quot;&lt;nixpkgs&quot;&gt; {} }:
@@ -360,19 +264,18 @@ let
         name = "hex2nix";
         version = "0.1.0";
         src = ./.;
-        beamDeps = [ ibrowse jsx erlware_commons ];
+        erlangDeps = [ ibrowse jsx erlware_commons ];
       };
   drv = beamPackages.callPackage f {};
 
 in
-
-  drv
+ drv
     </programlisting>
     <section xml:id="building-in-a-shell">
-    <title>Building in a Shell (for Mix Projects)</title>
+    <title>Building in a shell</title>
     <para>
-      We can leverage the support of the derivation, irrespective of the build
-      derivation, by calling the commands themselves.
+      We can leveral the support of the Derivation, regardless of
+      which build Derivation is called by calling the commands themselv.s
     </para>
     <programlisting>
 # =============================================================================
@@ -432,43 +335,42 @@ analyze: build plt
 
     </programlisting>
     <para>
-      Using a <literal>shell.nix</literal> as described (see <xref
-      linkend="creating-a-shell"/>) should just work. Aside from
+      If you add the <literal>shell.nix</literal> as described and
+      user rebar as follows things should simply work. Aside from the
       <literal>test</literal>, <literal>plt</literal>, and
-      <literal>analyze</literal>, the Make targets work just fine for all of the
-      build derivations.
+      <literal>analyze</literal> the talks work just fine for all of
+      the build Derivations.
     </para>
   </section>
 </section>
 </section>
 <section xml:id="generating-packages-from-hex-with-hex2nix">
-  <title>Generating Packages from Hex with <literal>hex2nix</literal></title>
+  <title>Generating Packages from Hex with Hex2Nix</title>
   <para>
-    Updating the <link xlink:href="https://hex.pm">Hex</link> package set
-    requires <link
-    xlink:href="https://github.com/erlang-nix/hex2nix">hex2nix</link>. Given the
-    path to the Erlang modules (usually
-    <literal>pkgs/development/erlang-modules</literal>), it will dump a file
-    called <literal>hex-packages.nix</literal>, containing all the packages that
-    use a recognized build system in <link
-    xlink:href="https://hex.pm">Hex</link>. It can't be determined, however,
-    whether every package is buildable.
+    Updating the Hex packages requires the use of the
+    <literal>hex2nix</literal> tool. Given the path to the Erlang
+    modules (usually
+    <literal>pkgs/development/erlang-modules</literal>). It will
+    happily dump a file called
+    <literal>hex-packages.nix</literal>. That file will contain all
+    the packages that use a recognized build system in Hex. However,
+    it can't know whether or not all those packages are buildable.
     </para>
     <para>
-      To make life easier for our users, try to build every <link
-      xlink:href="https://hex.pm">Hex</link> package and remove those that fail.
-      To do that, simply run the following command in the root of your
-      <literal>nixpkgs</literal> repository:
+      To make life easier for our users, it makes good sense to go
+      ahead and attempt to build all those packages and remove the
+      ones that don't build. To do that, simply run the command (in
+      the root of your <literal>nixpkgs</literal> repository). that follows.
     </para>
     <programlisting>
 $ nix-build -A beamPackages
     </programlisting>
     <para>
-      That will attempt to build every package in
-      <literal>beamPackages</literal>. Then manually remove those that fail.
-      Hopefully, someone will improve <link
-      xlink:href="https://github.com/erlang-nix/hex2nix">hex2nix</link> in the
-      future to automate the process.
+      That will build every package in
+      <literal>beamPackages</literal>. Then you can go through and
+      manually remove the ones that fail. Hopefully, someone will
+      improve <literal>hex2nix</literal> in the future to automate
+      that.
     </para>
 </section>
 </section>

doc/languages-frameworks/go.xml

@@ -13,7 +13,7 @@ standard Go programs.
 deis = buildGoPackage rec {
   name = "deis-${version}";
   version = "1.13.0";
-
+  
   goPackagePath = "github.com/deis/deis"; <co xml:id='ex-buildGoPackage-1' />
   subPackages = [ "client" ]; <co xml:id='ex-buildGoPackage-2' />
 
@@ -130,9 +130,6 @@ the following arguments are of special significance to the function:
 
 </para>
 
-<para>To extract dependency information from a Go package in automated way use <link xlink:href="https://github.com/kamilchm/go2nix">go2nix</link>.
-  It can produce complete derivation and <varname>goDeps</varname> file for Go programs.</para>
-
 <para>
   <varname>buildGoPackage</varname> produces <xref linkend='chap-multiple-output' xrefstyle="select: title" />
   where <varname>bin</varname> includes program binaries. You can test build a Go binary as follows:
@@ -163,4 +160,7 @@ done
 </screen>
 </para>
 
+<para>To extract dependency information from a Go package in automated way use <link xlink:href="https://github.com/kamilchm/go2nix">go2nix</link>.
+  It can produce complete derivation and <varname>goDeps</varname> file for Go programs.</para>
 </section>
+

doc/languages-frameworks/index.xml

@@ -27,7 +27,6 @@ such as Perl or Haskell.  These are described in this chapter.</para>
 <xi:include href="qt.xml" />
 <xi:include href="r.xml" /> <!-- generated from ../../pkgs/development/r-modules/README.md  -->
 <xi:include href="ruby.xml" />
-<xi:include href="rust.xml" />
 <xi:include href="texlive.xml" />
 <xi:include href="vim.xml" />
 

doc/languages-frameworks/qt.xml

@@ -2,55 +2,31 @@
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xml:id="sec-language-qt">
 
-<title>Qt</title>
+<title>Qt and KDE</title>
 
-<para>
-Qt is a comprehensive desktop and mobile application development toolkit for C++.
-Legacy support is available for Qt 3 and Qt 4, but all current development uses Qt 5.
-The Qt 5 packages in Nixpkgs are updated frequently to take advantage of new features,
-but older versions are typically retained until their support window ends.
-The most important consideration in packaging Qt-based software is ensuring that each package and all its dependencies use the same version of Qt 5;
-this consideration motivates most of the tools described below.
-</para>
+<para>Qt is a comprehensive desktop and mobile application development toolkit for C++. Legacy support is available for Qt 3 and Qt 4, but all current development uses Qt 5. The Qt 5 packages in Nixpkgs are updated frequently to take advantage of new features, but older versions are typically retained to support packages that may not be compatible with the latest version. When packaging applications and libraries for Nixpkgs, it is important to ensure that compatible versions of Qt 5 are used throughout; this consideration motivates the tools described below.</para>
 
-<section xml:id="ssec-qt-libraries"><title>Packaging Libraries for Nixpkgs</title>
+<section xml:id="ssec-qt-libraries"><title>Libraries</title>
 
-<para>
-Whenever possible, libraries that use Qt 5 should be built with each available version.
-Packages providing libraries should be added to the top-level function <varname>mkLibsForQt5</varname>,
-which is used to build a set of libraries for every Qt 5 version.
-A special <varname>callPackage</varname> function is used in this scope to ensure that the entire dependency tree uses the same Qt 5 version.
-Import dependencies unqualified, i.e., <literal>qtbase</literal> not <literal>qt5.qtbase</literal>.
-<emphasis>Do not</emphasis> import a package set such as <literal>qt5</literal> or <literal>libsForQt5</literal>.
-</para>
+<para>Libraries that depend on Qt 5 should be built with each available version to avoid linking a dependent package against incompatible versions of Qt 5. (Although Qt 5 maintains backward ABI compatibility, linking against multiple versions at once is generally not possible; at best it will lead to runtime faults.) Packages that provide libraries should be added to the top-level function <varname>mkLibsForQt5</varname>, which is used to build a set of libraries for every Qt 5 version. The <varname>callPackage</varname> provided in this scope will ensure that only one Qt version will be used throughout the dependency tree. Dependencies should be imported unqualified, i.e. <literal>qtbase</literal> not <literal>qt5.qtbase</literal>, so that <varname>callPackage</varname> can do its work. <emphasis>Do not</emphasis> import a package set such as <literal>qt5</literal> or <literal>libsForQt5</literal> into your package; although it may work fine in the moment, it could well break at the next Qt update.</para>
 
-<para>
-If a library does not support a particular version of Qt 5, it is best to mark it as broken by setting its <literal>meta.broken</literal> attribute.
-A package may be marked broken for certain versions by testing the <literal>qtbase.version</literal> attribute, which will always give the current Qt 5 version.
-</para>
+<para>If a library does not support a particular version of Qt 5, it is best to mark it as broken by setting its <literal>meta.broken</literal> attribute. A package may be marked broken for certain versions by testing the <literal>qtbase.version</literal> attribute, which will always give the current Qt 5 version.</para>
 
 </section>
 
-<section xml:id="ssec-qt-applications"><title>Packaging Applications for Nixpkgs</title>
+<section xml:id="ssec-qt-applications"><title>Applications</title>
 
-<para>
-Call your application expression using <literal>libsForQt5.callPackage</literal> instead of <literal>callPackage</literal>.
-Import dependencies unqualified, i.e., <literal>qtbase</literal> not <literal>qt5.qtbase</literal>.
-<emphasis>Do not</emphasis> import a package set such as <literal>qt5</literal> or <literal>libsForQt5</literal>.
-</para>
+<para>Applications generally do not need to be built with every Qt version because they do not provide any libraries for dependent packages to link against. The primary consideration is merely ensuring that the application itself and its dependencies are linked against only one version of Qt. To call your application expression, use <literal>libsForQt5.callPackage</literal> instead of <literal>callPackage</literal>. Dependencies should be imported unqualified, i.e. <literal>qtbase</literal> not <literal>qt5.qtbase</literal>. <emphasis>Do not</emphasis> import a package set such as <literal>qt5</literal> or <literal>libsForQt5</literal> into your package; although it may work fine in the moment, it could well break at the next Qt update.</para>
 
-<para>
-Qt 5 maintains strict backward compatibility, so it is generally best to build an application package against the latest version using the <varname>libsForQt5</varname> library set.
-In case a package does not build with the latest Qt version, it is possible to pick a set pinned to a particular version, e.g. <varname>libsForQt55</varname> for Qt 5.5, if that is the latest version the package supports.
-If a package must be pinned to an older Qt version, be sure to file a bug upstream;
-because Qt is strictly backwards-compatible, any incompatibility is by definition a bug in the application.
-</para>
+<para>It is generally best to build an application package against the <varname>libsForQt5</varname> library set. In case a package does not build with the latest Qt version, it is possible to pick a set pinned to a particular version, e.g. <varname>libsForQt55</varname> for Qt 5.5, if that is the latest version the package supports.</para>
 
-<para>
-When testing applications in Nixpkgs, it is a common practice to build the package with <literal>nix-build</literal> and run it using the created symbolic link.
-This will not work with Qt applications, however, because they have many hard runtime requirements that can only be guaranteed if the package is actually installed.
-To test a Qt application, install it with <literal>nix-env</literal> or run it inside <literal>nix-shell</literal>.
-</para>
+<para>Qt-based applications require that several paths be set at runtime. This is accomplished by wrapping the provided executables in a package with <literal>wrapQtProgram</literal> or <literal>makeQtWrapper</literal> during the <literal>postFixup</literal> phase. To use the wrapper generators, add <literal>makeQtWrapper</literal> to <literal>nativeBuildInputs</literal>. The wrapper generators support the same options as <literal>wrapProgram</literal> and <literal>makeWrapper</literal> respectively. It is usually only necessary to generate wrappers for programs intended to be invoked by the user.</para>
+
+</section>
+
+<section xml:id="ssec-qt-kde"><title>KDE</title>
+
+<para>The KDE Frameworks are a set of libraries for Qt 5 which form the basis of the Plasma desktop environment and the KDE Applications suite. Packaging a Frameworks-based library does not require any steps beyond those described above for general Qt-based libraries. Frameworks-based applications should not use <literal>makeQtWrapper</literal>; instead, use <literal>kdeWrapper</literal> to create the necessary wrappers: <literal>kdeWrapper { unwrapped = <replaceable>expr</replaceable>; targets = <replaceable>exes</replaceable>; }</literal>, where <replaceable>expr</replaceable> is the un-wrapped package expression and <replaceable>exes</replaceable> is a list of strings giving the relative paths to programs in the package which should be wrapped.</para>
 
 </section>
 

doc/languages-frameworks/ruby.xml

@@ -4,14 +4,10 @@
 
 <title>Ruby</title>
 
-<para>There currently is support to bundle applications that are packaged as
-Ruby gems. The utility "bundix" allows you to write a
-<filename>Gemfile</filename>, let bundler create a
-<filename>Gemfile.lock</filename>, and then convert this into a nix
-expression that contains all Gem dependencies automatically.
-</para>
+  <para>There currently is support to bundle applications that are packaged as Ruby gems. The utility "bundix" allows you to write a <filename>Gemfile</filename>, let bundler create a <filename>Gemfile.lock</filename>, and then convert
+  this into a nix expression that contains all Gem dependencies automatically.</para>
 
-<para>For example, to package sensu, we did:</para>
+  <para>For example, to package sensu, we did:</para>
 
 <screen>
 <![CDATA[$ cd pkgs/servers/monitoring
@@ -20,7 +16,8 @@ $ cd sensu
 $ cat > Gemfile
 source 'https://rubygems.org'
 gem 'sensu'
-$ $(nix-build '<nixpkgs>' -A bundix --no-out-link)/bin/bundix --magic
+$ nix-shell -p bundler --command "bundler package --path /tmp/vendor/bundle"
+$ $(nix-build '<nixpkgs>' -A bundix)/bin/bundix
 $ cat > default.nix
 { lib, bundlerEnv, ruby }:
 
@@ -42,61 +39,15 @@ bundlerEnv rec {
 }]]>
 </screen>
 
-<para>Please check in the <filename>Gemfile</filename>,
-<filename>Gemfile.lock</filename> and the
-<filename>gemset.nix</filename> so future updates can be run easily.
+<para>Please check in the <filename>Gemfile</filename>, <filename>Gemfile.lock</filename> and the <filename>gemset.nix</filename> so future updates can be run easily.
 </para>
 
-<para>For tools written in Ruby - i.e. where the desire is to install
-a package and then execute e.g. <command>rake</command> at the command
-line, there is an alternative builder called <literal>bundlerApp</literal>.
-Set up the <filename>gemset.nix</filename> the same way, and then, for
-example:
-</para>
-
-<screen>
-<![CDATA[{ lib, bundlerApp }:
-
-bundlerApp {
-  pname = "corundum";
-  gemdir = ./.;
-  exes = [ "corundum-skel" ];
-
-  meta = with lib; {
-    description = "Tool and libraries for maintaining Ruby gems.";
-    homepage    = https://github.com/nyarly/corundum;
-    license     = licenses.mit;
-    maintainers = [ maintainers.nyarly ];
-    platforms   = platforms.unix;
-  };
-}]]>
-</screen>
-
-<para>The chief advantage of <literal>bundlerApp</literal> over
-<literal>bundlerEnv</literal> is the executables introduced in the
-environment are precisely those selected in the <literal>exes</literal>
-list, as opposed to <literal>bundlerEnv</literal> which adds all the
-executables made available by gems in the gemset, which can mean e.g.
-<command>rspec</command> or <command>rake</command> in unpredictable
-versions available from various packages.
-</para>
-
-<para>Resulting derivations for both builders also have two helpful
-attributes, <literal>env</literal> and <literal>wrappedRuby</literal>.
-The first one allows one to quickly drop into
-<command>nix-shell</command> with the specified environment present.
-E.g. <command>nix-shell -A sensu.env</command> would give you an
-environment with Ruby preset so it has all the libraries necessary
-for <literal>sensu</literal> in its paths. The second one can be
-used to make derivations from custom Ruby scripts which have
-<filename>Gemfile</filename>s with their dependencies specified. It is
-a derivation with <command>ruby</command> wrapped so it can find all
-the needed dependencies. For example, to make a derivation
-<literal>my-script</literal> for a <filename>my-script.rb</filename>
-(which should be placed in <filename>bin</filename>) you should run
-<command>bundix</command> as specified above and then use
-<literal>bundlerEnv</literal> like this:
-</para>
+<para>Resulting derivations also have two helpful items, <literal>env</literal> and <literal>wrapper</literal>. The first one allows one to quickly drop into
+<command>nix-shell</command> with the specified environment present. E.g. <command>nix-shell -A sensu.env</command> would give you an environment with Ruby preset
+so it has all the libraries necessary for <literal>sensu</literal> in its paths. The second one can be used to make derivations from custom Ruby scripts which have
+<filename>Gemfile</filename>s with their dependencies specified. It is a derivation with <command>ruby</command> wrapped so it can find all the needed dependencies.
+For example, to make a derivation <literal>my-script</literal> for a <filename>my-script.rb</filename> (which should be placed in <filename>bin</filename>) you should
+run <command>bundix</command> as specified above and then use <literal>bundlerEnv</literal> lile this:</para>
 
 <programlisting>
 <![CDATA[let env = bundlerEnv {
@@ -110,9 +61,13 @@ the needed dependencies. For example, to make a derivation
 
 in stdenv.mkDerivation {
   name = "my-script";
-  buildInputs = [ env.wrappedRuby ];
+
+  buildInputs = [ env.wrapper ];
+
   script = ./my-script.rb;
+
   buildCommand = ''
+    mkdir -p $out/bin
     install -D -m755 $script $out/bin/my-script
     patchShebangs $out/bin/my-script
   '';
@@ -120,3 +75,4 @@ in stdenv.mkDerivation {
 </programlisting>
 
 </section>
+

doc/languages-frameworks/rust.md

@@ -1,91 +0,0 @@
----
-title: Rust
-author: Matthias Beyer
-date: 2017-03-05
----
-
-# User's Guide to the Rust Infrastructure
-
-To install the rust compiler and cargo put
-
-```
-rustStable.rustc
-rustStable.cargo
-```
-
-into the `environment.systemPackages` or bring them into scope with
-`nix-shell -p rustStable.rustc -p rustStable.cargo`.
-
-There are also `rustBeta` and `rustNightly` package sets available.
-These are not updated very regulary. For daily builds use either rustup from
-nixpkgs or use the [Rust nightlies overlay](#using-the-rust-nightlies-overlay).
-
-## Packaging Rust applications
-
-Rust applications are packaged by using the `buildRustPackage` helper from `rustPlatform`:
-
-```
-with rustPlatform;
-
-buildRustPackage rec {
-  name = "ripgrep-${version}";
-  version = "0.4.0";
-
-  src = fetchFromGitHub {
-    owner = "BurntSushi";
-    repo = "ripgrep";
-    rev = "${version}";
-    sha256 = "0y5d1n6hkw85jb3rblcxqas2fp82h3nghssa4xqrhqnz25l799pj";
-  };
-
-  depsSha256 = "0q68qyl2h6i0qsz82z840myxlnjay8p1w5z7hfyr8fqp7wgwa9cx";
-
-  meta = with stdenv.lib; {
-    description = "A utility that combines the usability of The Silver Searcher with the raw speed of grep";
-    homepage = https://github.com/BurntSushi/ripgrep;
-    license = with licenses; [ unlicense ];
-    maintainers = [ maintainers.tailhook ];
-    platforms = platforms.all;
-  };
-}
-```
-
-`buildRustPackage` requires a `depsSha256` attribute which is computed over
-all crate sources of this package. Currently it is obtained by inserting a
-fake checksum into the expression and building the package once. The correct
-checksum can be then take from the failed build.
-
-To install crates with nix there is also an experimental project called
-[nixcrates](https://github.com/fractalide/nixcrates).
-
-## Using the Rust nightlies overlay
-
-Mozilla provides an overlay for nixpkgs to bring a nightly version of Rust into scope.
-This overlay can _also_ be used to install recent unstable or stable versions
-of Rust, if desired.
-
-To use this overlay, clone
-[nixpkgs-mozilla](https://github.com/mozilla/nixpkgs-mozilla),
-and create a symbolic link to the file
-[rust-overlay.nix](https://github.com/mozilla/nixpkgs-mozilla/blob/master/rust-overlay.nix)
-in the `~/.config/nixpkgs/overlays` directory.
-
-    $ git clone https://github.com/mozilla/nixpkgs-mozilla.git
-    $ mkdir -p ~/.config/nixpkgs/overlays
-    $ ln -s $(pwd)/nixpkgs-mozilla/rust-overlay.nix ~/.config/nixpkgs/overlays/rust-overlay.nix
-
-The latest version can be installed with the following command:
-
-    $ nix-env -Ai nixos.rustChannels.stable.rust
-
-Or using the attribute with nix-shell:
-
-    $ nix-shell -p nixos.rustChannels.stable.rust
-
-To install the beta or nightly channel, "stable" should be substituted by
-"nightly" or "beta", or
-use the function provided by this overlay to pull a version based on a
-build date.
-
-The overlay automatically updates itself as it uses the same source as
-[rustup](https://www.rustup.rs/).

doc/languages-frameworks/vim.md

@@ -8,48 +8,15 @@ date: 2016-06-25
 You'll get a vim(-your-suffix) in PATH also loading the plugins you want.
 Loading can be deferred; see examples.
 
-Vim packages, VAM (=vim-addon-manager) and Pathogen are supported to load
-packages.
+VAM (=vim-addon-manager) and Pathogen plugin managers are supported.
+Vundle, NeoBundle could be your turn.
 
-## Custom configuration
-
-Adding custom .vimrc lines can be done using the following code:
-
-```
-vim_configurable.customize {
-  name = "vim-with-plugins";
-
-  vimrcConfig.customRC = ''
-    set hidden
-  '';
-}
-```
-
-## Vim packages
-
-To store you plugins in Vim packages the following example can be used:
-
-```
-vim_configurable.customize {
-  vimrcConfig.packages.myVimPackage = with pkgs.vimPlugins; {
-    # loaded on launch
-    start = [ youcompleteme fugitive ];
-    # manually loadable by calling `:packadd $plugin-name`
-    opt = [ phpCompletion elm-vim ];
-    # To automatically load a plugin when opening a filetype, add vimrc lines like:
-    # autocmd FileType php :packadd phpCompletion
-  }
-};
-```
-
-## VAM
-
-### dependencies by Vim plugins
+## dependencies by Vim plugins
 
 VAM introduced .json files supporting dependencies without versioning
 assuming that "using latest version" is ok most of the time.
 
-### Example
+## HOWTO
 
 First create a vim-scripts file having one plugin name per line. Example:
 

doc/multiple-output.xml

@@ -16,6 +16,7 @@
 
 <section><title>Installing a split package</title>
   <para>When installing a package via <varname>systemPackages</varname> or <command>nix-env</command> you have several options:</para>
+  <warning><para>Currently <command>nix-env</command> almost always installs all outputs until https://github.com/NixOS/nix/pull/815 gets merged.</para></warning>
   <itemizedlist>
     <listitem><para>You can install particular outputs explicitly, as each is available in the Nix language as an attribute of the package.  The <varname>outputs</varname> attribute contains a list of output names.</para></listitem>
     <listitem><para>You can let it use the default outputs.  These are handled by <varname>meta.outputsToInstall</varname> attribute that contains a list of output names.</para>
@@ -73,7 +74,7 @@
 
       <varlistentry><term><varname>
         $outputMan</varname></term><listitem><para>
-        is for man pages (except for section 3). They go to <varname>man</varname> or <varname>$outputBin</varname> by default.
+        is for man pages (except for section 3). They go to <varname>man</varname> or <varname>doc</varname> or <varname>$outputBin</varname> by default.
       </para></listitem></varlistentry>
 
       <varlistentry><term><varname>
@@ -83,7 +84,7 @@
 
       <varlistentry><term><varname>
         $outputInfo</varname></term><listitem><para>
-        is for info pages. They go to <varname>info</varname> or <varname>$outputBin</varname> by default.
+        is for info pages. They go to <varname>info</varname> or <varname>doc</varname> or <varname>$outputMan</varname> by default.
       </para></listitem></varlistentry>
 
     </variablelist>

doc/overlays.xml

@@ -8,88 +8,59 @@
 overlays. Overlays are used to add layers in the fix-point used by Nixpkgs
 to compose the set of all packages.</para>
 
-<para>Nixpkgs can be configured with a list of overlays, which are
-applied in order. This means that the order of the overlays can be significant
-if multiple layers override the same package.</para>
-
 <!--============================================================-->
 
 <section xml:id="sec-overlays-install">
-<title>Installing overlays</title>
+<title>Installing Overlays</title>
 
-<para>The list of overlays is determined as follows.</para>
-
-<para>If the <varname>overlays</varname> argument is not provided explicitly, we look for overlays in a path. The path
-is determined as follows:
+<para>The set of overlays is looked for in the following places. The
+first one present is considered, and all the rest are ignored:
 
 <orderedlist>
 
   <listitem>
-    <para>First, if an <varname>overlays</varname> argument to the nixpkgs function itself is given,
-    then that is used.</para>
 
-    <para>This can be passed explicitly when importing nipxkgs, for example 
-    <literal>import &lt;nixpkgs> { overlays = [ overlay1 overlay2 ]; }</literal>.</para>
+    <para>As an argument of the imported attribute set. When importing Nixpkgs,
+    the <varname>overlays</varname> attribute argument can be set to a list of
+    functions, which is described in <xref linkend="sec-overlays-layout"/>.</para>
+
   </listitem>
 
   <listitem>
-    <para>Otherwise, if the Nix path entry <literal>&lt;nixpkgs-overlays></literal> exists, we look for overlays
-    at that path, as described below.</para>
 
-    <para>See the section on <literal>NIX_PATH</literal> in the Nix manual for more details on how to 
-    set a value for <literal>&lt;nixpkgs-overlays>.</literal></para>
+    <para>In the directory pointed to by the Nix search path entry
+    <literal>&lt;nixpkgs-overlays></literal>.</para>
   </listitem>
 
   <listitem>
-    <para>If one of <filename>~/.config/nixpkgs/overlays.nix</filename> and
-    <filename>~/.config/nixpkgs/overlays/</filename> exists, then we look for overlays at that path, as
-    described below. It is an error if both exist.</para>
+
+    <para>In the directory <filename>~/.nixpkgs/overlays/</filename>.</para>
   </listitem>
 
 </orderedlist>
 </para>
 
-<para>If we are looking for overlays at a path, then there are two cases:
-<itemizedlist>
-  <listitem>
-    <para>If the path is a file, then the file is imported as a Nix expression and used as the list of
-    overlays.</para>
-  </listitem>
+<para>For the second and third options, the directory should contain Nix expressions defining the
+overlays. Each overlay can be a file, a directory containing a
+<filename>default.nix</filename>, or a symlink to one of those. The expressions should follow
+the syntax described in <xref linkend="sec-overlays-layout"/>.</para>
 
-  <listitem>
-    <para>If the path is a directory, then we take the content of the directory, order it
-    lexicographically, and attempt to interpret each as an overlay by:
-    <itemizedlist>
-      <listitem>
-        <para>Importing the file, if it is a <literal>.nix</literal> file.</para>
-      </listitem>
-      <listitem>
-        <para>Importing a top-level <filename>default.nix</filename> file, if it is a directory.</para>
-      </listitem>
-    </itemizedlist>
-    </para>
-  </listitem>
-</itemizedlist>
-</para>
+<para>The order of the overlay layers can influence the recipe of packages if multiple layers override
+the same recipe. In the case where overlays are loaded from a directory, they are loaded in
+alphabetical order.</para>
 
-<para>On a NixOS system the value of the <literal>nixpkgs.overlays</literal> option, if present, 
-is passed to the system Nixpkgs directly as an argument. Note that this does not affect the overlays for
-non-NixOS operations (e.g. <literal>nix-env</literal>), which are looked up independently.</para>
-
-<para>The <filename>overlays.nix</filename> option therefore provides a convenient way to use the same
-overlays for a NixOS system configuration and user configuration: the same file can be used
-as <filename>overlays.nix</filename> and imported as the value of <literal>nixpkgs.overlays</literal>.</para>
+<para>To install an overlay using the last option, you can clone the overlay's repository and add
+a symbolic link to it in <filename>~/.nixpkgs/overlays/</filename> directory.</para>
 
 </section>
 
 <!--============================================================-->
 
-<section xml:id="sec-overlays-definition">
-<title>Defining overlays</title>
+<section xml:id="sec-overlays-layout">
+<title>Overlays Layout</title>
 
-<para>Overlays are Nix functions which accept two arguments, 
-conventionally called <varname>self</varname> and <varname>super</varname>, 
-and return a set of packages. For example, the following is a valid overlay.</para>
+<para>Overlays are expressed as Nix functions which accept 2 arguments and return a set of
+packages.</para>
 
 <programlisting>
 self: super:
@@ -104,31 +75,25 @@ self: super:
 }
 </programlisting>
 
-<para>The first argument (<varname>self</varname>) corresponds to the final package
+<para>The first argument, usually named <varname>self</varname>, corresponds to the final package
 set. You should use this set for the dependencies of all packages specified in your
 overlay. For example, all the dependencies of <varname>rr</varname> in the example above come
-from <varname>self</varname>, as well as the overridden dependencies used in the
+from <varname>self</varname>, as well as the overriden dependencies used in the
 <varname>boost</varname> override.</para>
 
-<para>The second argument (<varname>super</varname>)
+<para>The second argument, usually named <varname>super</varname>,
 corresponds to the result of the evaluation of the previous stages of
 Nixpkgs. It does not contain any of the packages added by the current
-overlay, nor any of the following overlays. This set should be used either
+overlay nor any of the following overlays. This set should be used either
 to refer to packages you wish to override, or to access functions defined
 in Nixpkgs. For example, the original recipe of <varname>boost</varname>
 in the above example, comes from <varname>super</varname>, as well as the
 <varname>callPackage</varname> function.</para>
 
 <para>The value returned by this function should be a set similar to
-<filename>pkgs/top-level/all-packages.nix</filename>, containing
+<filename>pkgs/top-level/all-packages.nix</filename>, which contains
 overridden and/or new packages.</para>
 
-<para>Overlays are similar to other methods for customizing Nixpkgs, in particular
-the <literal>packageOverrides</literal> attribute described in <xref linkend="sec-modify-via-packageOverrides"/>.
-Indeed, <literal>packageOverrides</literal> acts as an overlay with only the 
-<varname>super</varname> argument. It is therefore appropriate for basic use, 
-but overlays are more powerful and easier to distribute.</para>
-
 </section>
 
 </chapter>

doc/package-notes.xml

@@ -366,33 +366,15 @@ it. Place the resulting <filename>package.nix</filename> file into
 
 </section>
 
-<section xml:id="sec-shell-helpers">
+<section xml:id="sec-autojump">
 
-<title>Interactive shell helpers</title>
+<title>Autojump</title>
 
 <para>
-  Some packages provide the shell integration to be more useful. But
-  unlike other systems, nix doesn't have a standard share directory
-  location. This is why a bunch <command>PACKAGE-share</command>
-  scripts are shipped that print the location of the corresponding
-  shared folder.
-
-  Current list of such packages is as following:
-
-  <itemizedlist>
-    <listitem>
-      <para>
-        <literal>autojump</literal>: <command>autojump-share</command>
-      </para>
-    </listitem>
-    <listitem>
-      <para>
-        <literal>fzf</literal>: <command>fzf-share</command>
-      </para>
-    </listitem>
-  </itemizedlist>
-
-  E.g. <literal>autojump</literal> can then used in the .bashrc like this:
+  autojump needs the shell integration to be useful but unlike other systems,
+  nix doesn't have a standard share directory location. This is why a
+  <command>autojump-share</command> script is shipped that prints the location
+  of the shared folder. This can then be used in the .bashrc like this:
 <screen>
   source "$(autojump-share)/autojump.bash"
 </screen>
@@ -534,140 +516,4 @@ to your configuration, rebuild, and run the game with
 
 </section>
 
-<section xml:id="sec-emacs">
-
-<title>Emacs</title>
-
-<section xml:id="sec-emacs-config">
-
-<title>Configuring Emacs</title>
-
-<para>
-  The Emacs package comes with some extra helpers to make it easier to
-  configure. <varname>emacsWithPackages</varname> allows you to manage
-  packages from ELPA. This means that you will not have to install
-  that packages from within Emacs. For instance, if you wanted to use
-  <literal>company</literal>, <literal>counsel</literal>,
-  <literal>flycheck</literal>, <literal>ivy</literal>,
-  <literal>magit</literal>, <literal>projectile</literal>, and
-  <literal>use-package</literal> you could use this as a
-  <filename>~/.config/nixpkgs/config.nix</filename> override:
-</para>
-
-<screen>
-{
-  packageOverrides = pkgs: with pkgs; {
-    myEmacs = emacsWithPackages (epkgs: (with epkgs.melpaStablePackages; [
-      company
-      counsel
-      flycheck
-      ivy
-      magit
-      projectile
-      use-package
-    ]));
-  }
-}
-</screen>
-
-<para>
-  You can install it like any other packages via <command>nix-env -iA
-  myEmacs</command>. However, this will only install those packages.
-  It will not <literal>configure</literal> them for us. To do this, we
-  need to provide a configuration file. Luckily, it is possible to do
-  this from within Nix! By modifying the above example, we can make
-  Emacs load a custom config file. The key is to create a package that
-  provide a <filename>default.el</filename> file in
-  <filename>/share/emacs/site-start/</filename>. Emacs knows to load
-  this file automatically when it starts.
-</para>
-
-<screen>
-{
-  packageOverrides = pkgs: with pkgs; rec {
-    myEmacsConfig = writeText "default.el" ''
-;; initialize package
-
-(require 'package)
-(package-initialize 'noactivate)
-(eval-when-compile
-  (require 'use-package))
-
-;; load some packages
-
-(use-package company
-  :bind ("&lt;C-tab&gt;" . company-complete)
-  :diminish company-mode
-  :commands (company-mode global-company-mode)
-  :defer 1
-  :config
-  (global-company-mode))
-
-(use-package counsel
-  :commands (counsel-descbinds)
-  :bind (([remap execute-extended-command] . counsel-M-x)
-         ("C-x C-f" . counsel-find-file)
-         ("C-c g" . counsel-git)
-         ("C-c j" . counsel-git-grep)
-         ("C-c k" . counsel-ag)
-         ("C-x l" . counsel-locate)
-         ("M-y" . counsel-yank-pop)))
-
-(use-package flycheck
-  :defer 2
-  :config (global-flycheck-mode))
-
-(use-package ivy
-  :defer 1
-  :bind (("C-c C-r" . ivy-resume)
-         ("C-x C-b" . ivy-switch-buffer)
-         :map ivy-minibuffer-map
-         ("C-j" . ivy-call))
-  :diminish ivy-mode
-  :commands ivy-mode
-  :config
-  (ivy-mode 1))
-
-(use-package magit
-  :defer
-  :if (executable-find "git")
-  :bind (("C-x g" . magit-status)
-         ("C-x G" . magit-dispatch-popup))
-  :init
-  (setq magit-completing-read-function 'ivy-completing-read))
-
-(use-package projectile
-  :commands projectile-mode
-  :bind-keymap ("C-c p" . projectile-command-map)
-  :defer 5
-  :config
-  (projectile-global-mode))
-    '';
-    myEmacs = emacsWithPackages (epkgs: (with epkgs.melpaStablePackages; [
-      (runCommand "default.el" {} ''
-mkdir -p $out/share/emacs/site-lisp
-cp ${myEmacsConfig} $out/share/emacs/site-lisp/default.el
-'')
-      company
-      counsel
-      flycheck
-      ivy
-      magit
-      projectile
-      use-package
-    ]));
-  };
-}
-</screen>
-
-<para>
-  This provides a fairly full Emacs start file. It will load in
-  addition to the user's presonal config. You can always disable it by
-  passing <command>-q</command> to the Emacs command.
-</para>
-
-</section>
-
-</section>
-
 </chapter>

doc/quick-start.xml

@@ -212,7 +212,7 @@ $ nix-env -f . -iA libfoo</screen>
 
   <listitem>
     <para>Optionally commit the new package and open a pull request, or send a patch to
-    <literal>https://groups.google.com/forum/#!forum/nix-devel</literal>.</para>
+    <literal>nix-dev@cs.uu.nl</literal>.</para>
   </listitem>
 
 

doc/reviewing-contributions.xml

@@ -18,7 +18,7 @@
 <para>The high change rate of nixpkgs make any pull request that is open for 
   long enough subject to conflicts that will require extra work from the 
   submitter or the merger. Reviewing pull requests in a timely manner and being 
-  responsive to the comments is the key to avoid these. GitHub provides sort 
+  responsive to the comments is the key to avoid these. Github provides sort 
   filters that can be used to see the <link 
     xlink:href="https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+sort%3Aupdated-desc">most 
     recently</link> and the <link 

doc/stdenv.xml

@@ -1,4 +1,3 @@
-
 <chapter xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xml:id="chap-stdenv">
@@ -319,13 +318,7 @@ containing some shell commands to be executed, or by redefining the
 shell function
 <varname><replaceable>name</replaceable>Phase</varname>.  The former
 is convenient to override a phase from the derivation, while the
-latter is convenient from a build script.
-
-However, typically one only wants to <emphasis>add</emphasis> some
-commands to a phase, e.g. by defining <literal>postInstall</literal>
-or <literal>preFixup</literal>, as skipping some of the default actions
-may have unexpected consequences.
-</para>
+latter is convenient from a build script.</para>
 
 
 <section xml:id="ssec-controlling-phases"><title>Controlling
@@ -641,16 +634,6 @@ script) if it exists.</para>
     true.</para></listitem>
   </varlistentry>
 
-  <varlistentry>
-    <term><varname>configurePlatforms</varname></term>
-    <listitem><para>
-      By default, when cross compiling, the configure script has <option>--build=...</option> and <option>--host=...</option> passed.
-      Packages can instead pass <literal>[ "build" "host" "target" ]</literal> or a subset to control exactly which platform flags are passed.
-      Compilers and other tools should use this to also pass the target platform, for example.
-      Note eventually these will be passed when in native builds too, to improve determinism: build-time guessing, as is done today, is a risk of impurity.
-    </para></listitem>
-  </varlistentry>
-
   <varlistentry>
     <term><varname>preConfigure</varname></term>
     <listitem><para>Hook executed at the start of the configure
@@ -1154,7 +1137,7 @@ makeWrapper $out/bin/foo $wrapperfile --prefix PATH : ${lib.makeBinPath [ hello
 
     </listitem>
   </varlistentry>
-
+  
 
   <varlistentry xml:id='fun-substitute'>
     <term><function>substitute</function>
@@ -1173,7 +1156,7 @@ makeWrapper $out/bin/foo $wrapperfile --prefix PATH : ${lib.makeBinPath [ hello
             <term><option>--replace</option>
             <replaceable>s1</replaceable>
             <replaceable>s2</replaceable></term>
-            <listitem><para>Replace every occurrence of the string
+            <listitem><para>Replace every occurence of the string
             <replaceable>s1</replaceable> by
             <replaceable>s2</replaceable>.</para></listitem>
           </varlistentry>
@@ -1181,7 +1164,7 @@ makeWrapper $out/bin/foo $wrapperfile --prefix PATH : ${lib.makeBinPath [ hello
           <varlistentry>
             <term><option>--subst-var</option>
             <replaceable>varName</replaceable></term>
-            <listitem><para>Replace every occurrence of
+            <listitem><para>Replace every occurence of
             <literal>@<replaceable>varName</replaceable>@</literal> by
             the contents of the environment variable
             <replaceable>varName</replaceable>.  This is useful for
@@ -1194,7 +1177,7 @@ makeWrapper $out/bin/foo $wrapperfile --prefix PATH : ${lib.makeBinPath [ hello
             <term><option>--subst-var-by</option>
             <replaceable>varName</replaceable>
             <replaceable>s</replaceable></term>
-            <listitem><para>Replace every occurrence of
+            <listitem><para>Replace every occurence of
             <literal>@<replaceable>varName</replaceable>@</literal> by
             the string <replaceable>s</replaceable>.</para></listitem>
           </varlistentry>
@@ -1242,7 +1225,7 @@ substitute ./foo.in ./foo.out \
     <term><function>substituteAll</function>
     <replaceable>infile</replaceable>
     <replaceable>outfile</replaceable></term>
-    <listitem><para>Replaces every occurrence of
+    <listitem><para>Replaces every occurence of
     <literal>@<replaceable>varName</replaceable>@</literal>, where
     <replaceable>varName</replaceable> is any environment variable, in
     <replaceable>infile</replaceable>, writing the result to
@@ -1313,7 +1296,7 @@ someVar=$(stripHash $name)
 
     </para></listitem>
   </varlistentry>
-
+  
 
   <varlistentry xml:id='fun-wrapProgram'>
     <term><function>wrapProgram</function>
@@ -1343,34 +1326,12 @@ someVar=$(stripHash $name)
 <variablelist>
 
   <varlistentry>
-    <term>CC Wrapper</term>
-    <listitem>
-      <para>
-        CC Wrapper wraps a C toolchain for a bunch of miscellaneous purposes.
-        Specifically, a C compiler (GCC or Clang), Binutils (or the CCTools + binutils mashup when targetting Darwin), and a C standard library (glibc or Darwin's libSystem) are all fed in, and dependency finding, hardening (see below), and purity checks for each are handled by CC Wrapper.
-        Packages typically depend on only CC Wrapper, instead of those 3 inputs directly.
-      </para>
-      <para>
-        Dependency finding is undoubtedly the main task of CC wrapper.
-        It is currently accomplished by collecting directories of host-platform dependencies (i.e. <varname>buildInputs</varname> and <varname>nativeBuildInputs</varname>) in environment variables.
-        CC wrapper's setup hook causes any <filename>include</filename> subdirectory of such a dependency to be added to <envar>NIX_CFLAGS_COMPILE</envar>, and any <filename>lib</filename> and <filename>lib64</filename> subdirectories to <envar>NIX_LDFLAGS</envar>.
-        The setup hook itself contains some lengthy comments describing the exact convoluted mechanism by which this is accomplished.
-      </para>
-      <para>
-        A final task of the setup hook is defining a number of standard environment variables to tell build systems which executables full-fill which purpose.
-        They are defined to just be the base name of the tools, under the assumption that CC Wrapper's binaries will be on the path.
-        Firstly, this helps poorly-written packages, e.g. ones that look for just <command>gcc</command> when <envar>CC</envar> isn't defined yet <command>clang</command> is to be used.
-        Secondly, this helps packages not get confused when cross-compiling, in which case multiple CC wrappers may be simultaneous in use (targeting different platforms).
-        <envar>BUILD_</envar>- and <envar>TARGET_</envar>-prefixed versions of the normal environment variable are defined for the additional CC Wrappers, properly disambiguating them.
-      </para>
-      <para>
-        A problem with this final task is that CC Wrapper is honest and defines <envar>LD</envar> as <command>ld</command>.
-        Most packages, however, firstly use the C compiler for linking, secondly use <envar>LD</envar> anyways, defining it as the C compiler, and thirdly, only so define <envar>LD</envar> when it is undefined as a fallback.
-        This triple-threat means CC Wrapper will break those packages, as LD is already defined as the actually linker which the package won't override yet doesn't want to use.
-        The workaround is to define, just for the problematic package, <envar>LD</envar> as the C compiler.
-        A good way to do this would be <command>preConfigure = "LD=$CC"</command>.
-      </para>
-    </listitem>
+    <term>GCC wrapper</term>
+    <listitem><para>Adds the <filename>include</filename> subdirectory
+    of each build input to the <envar>NIX_CFLAGS_COMPILE</envar>
+    environment variable, and the <filename>lib</filename> and
+    <filename>lib64</filename> subdirectories to
+    <envar>NIX_LDFLAGS</envar>.</para></listitem>
   </varlistentry>
 
   <varlistentry>
@@ -1567,7 +1528,7 @@ bin/blib.a(bios_console.o): In function `bios_handle_cup':
     depends on such a format string, it will need to be worked around.
     </para>
 
-    <para>Additionally, some warnings are enabled which might trigger build
+    <para>Addtionally, some warnings are enabled which might trigger build
     failures if compiler warnings are treated as errors in the package build.
     In this case, set <option>NIX_CFLAGS_COMPILE</option> to
     <option>-Wno-error=warning-type</option>.</para>
@@ -1597,7 +1558,7 @@ fcntl2.h:50:4: error: call to '__open_missing_mode' declared with attribute erro
     <term><varname>pic</varname></term>
     <listitem>
     <para>Adds the <option>-fPIC</option> compiler options. This options adds
-    support for position independent code in shared libraries and thus making
+    support for position independant code in shared libraries and thus making
     ASLR possible.</para>
     <para>Most notably, the Linux kernel, kernel modules and other code
     not running in an operating system environment like boot loaders won't

doc/submitting-changes.xml

@@ -223,133 +223,6 @@ Additional information.
 </itemizedlist>
 </section>
 
-<section>
-  <title>Pull Request Template</title>
-  <para>
-    The pull request template helps determine what steps have been made for a
-    contribution so far, and will help guide maintainers on the status of a
-    change. The motivation section of the PR should include any extra details
-    the title does not address and link any existing issues related to the pull
-    request.
-  </para>
-  <para>When a PR is created, it will be pre-populated with some checkboxes detailed below:
-  </para>
-  <section>
-    <title>Tested using sandboxing</title>
-    <para>
-      When sandbox builds are enabled, Nix will setup an isolated environment
-      for each build process. It is used to remove further hidden dependencies
-      set by the build environment to improve reproducibility. This includes
-      access to the network during the build outside of
-      <function>fetch*</function> functions and files outside the Nix store.
-      Depending on the operating system access to other resources are blocked
-      as well (ex. inter process communication is isolated on Linux); see <link
-      xlink:href="https://nixos.org/nix/manual/#description-45">build-use-sandbox</link>
-      in Nix manual for details.
-    </para>
-    <para>
-      Sandboxing is not enabled by default in Nix due to a small performance
-      hit on each build.  In pull requests for <link
-        xlink:href="https://github.com/NixOS/nixpkgs/">nixpkgs</link> people
-      are asked to test builds with sandboxing enabled (see <literal>Tested
-        using sandboxing</literal> in the pull request template) because
-      in<link
-        xlink:href="https://nixos.org/hydra/">https://nixos.org/hydra/</link>
-      sandboxing is also used.
-    </para>
-    <para>
-      Depending if you use NixOS or other platforms you can use one of the
-      following methods to enable sandboxing <emphasis role="bold">before</emphasis> building the package:
-      <itemizedlist>
-        <listitem>
-          <para>
-            <emphasis role="bold">Globally enable sandboxing on NixOS</emphasis>:
-            add the following to 
-            <filename>configuration.nix</filename>
-            <screen>nix.useSandbox = true;</screen>
-          </para>
-        </listitem>
-        <listitem>
-          <para>
-            <emphasis role="bold">Globally enable sandboxing on non-NixOS platforms</emphasis>:
-            add the following to: <filename>/etc/nix/nix.conf</filename>
-            <screen>build-use-sandbox = true</screen>
-          </para>
-        </listitem>
-      </itemizedlist>
-    </para>
-    
-  </section>
-  <section>
-    <title>Built on platform(s)</title>
-    <para>
-      Many Nix packages are designed to run on multiple
-      platforms. As such, it's important to let the maintainer know which
-      platforms your changes have been tested on. It's not always practical to
-      test a change on all platforms, and is not required for a pull request to
-      be merged. Only check the systems you tested the build on in this
-      section.
-    </para>
-  </section>
-  <section>
-    <title>Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)</title>
-    <para>
-      Packages with automated tests are much more likely to be merged in a
-      timely fashion because it doesn't require as much manual testing by the
-      maintainer to verify the functionality of the package. If there are
-      existing tests for the package, they should be run to verify your changes
-      do not break the tests. Tests only apply to packages with NixOS modules
-      defined and can only be run on Linux. For more details on writing and
-      running tests, see the <link
-        xlink:href="https://nixos.org/nixos/manual/index.html#sec-nixos-tests">section
-        in the NixOS manual</link>.
-    </para>
-  </section>
-  <section>
-    <title>Tested compilation of all pkgs that depend on this change using <command>nox-review</command></title>
-    <para>
-      If you are updating a package's version, you can use nox to make sure all
-      packages that depend on the updated package still compile correctly. This
-      can be done using the nox utility. The <command>nox-review</command>
-      utility can look for and build all dependencies either based on
-      uncommited changes with the <literal>wip</literal> option or specifying a
-      github pull request number.
-    </para>
-    <para>
-      review uncommitted changes:
-      <screen>nix-shell -p nox --run nox-review wip</screen>
-    </para>
-    <para>
-      review changes from pull request number 12345:
-      <screen>nix-shell -p nox --run nox-review pr 12345</screen>
-    </para>
-  </section>
-  <section>
-    <title>Tested execution of all binary files (usually in <filename>./result/bin/</filename>)</title>
-    <para>
-      It's important to test any executables generated by a build when you
-      change or create a package in nixpkgs. This can be done by looking in
-      <filename>./result/bin</filename> and running any files in there, or at a
-      minimum, the main executable for the package. For example, if you make a change
-      to <package>texlive</package>, you probably would only check the binaries
-      associated with the change you made rather than testing all of them.
-    </para>
-  </section>
-  <section>
-    <title>Meets nixpkgs contribution standards</title>
-    <para>
-      The last checkbox is fits <link
-        xlink:href="https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md">CONTRIBUTING.md</link>.
-      The contributing document has detailed information on standards the Nix
-      community has for commit messages, reviews, licensing of contributions
-      you make to the project, etc... Everyone should read and understand the
-      standards the community has for contributing before submitting a pull
-      request.
-    </para>
-    
-  </section>
-</section>
-
 <section>
 <title>Hotfixing pull requests</title>
 

lib/attrsets.nix

@@ -1,12 +1,12 @@
 # Operations on attribute sets.
 
-let
+with {
   inherit (builtins) head tail length;
-  inherit (import ./trivial.nix) and or;
+  inherit (import ./trivial.nix) or;
   inherit (import ./default.nix) fold;
   inherit (import ./strings.nix) concatStringsSep;
   inherit (import ./lists.nix) concatMap concatLists all deepSeqList;
-in
+};
 
 rec {
   inherit (builtins) attrNames listToAttrs hasAttr isAttrs getAttr;
@@ -116,7 +116,7 @@ rec {
     listToAttrs (concatMap (name: let v = set.${name}; in if pred name v then [(nameValuePair name v)] else []) (attrNames set));
 
 
-  /* Filter an attribute set recursively by removing all attributes for
+  /* Filter an attribute set recursivelly by removing all attributes for
      which the given predicate return false.
 
      Example:
@@ -334,7 +334,7 @@ rec {
       value = f name (catAttrs name sets);
     }) names);
 
-  /* Implementation note: Common names  appear multiple times in the list of
+  /* Implentation note: Common names  appear multiple times in the list of
      names, hopefully this does not affect the system because the maximal
      laziness avoid computing twice the same expression and listToAttrs does
      not care about duplicated attribute names.
@@ -353,7 +353,7 @@ rec {
   zipAttrs = zipAttrsWith (name: values: values);
 
   /* Does the same as the update operator '//' except that attributes are
-     merged until the given predicate is verified.  The predicate should
+     merged until the given pedicate is verified.  The predicate should
      accept 3 arguments which are the path to reach the attribute, a part of
      the first attribute set and a part of the second attribute set.  When
      the predicate is verified, the value of the first attribute set is
@@ -417,15 +417,18 @@ rec {
 
   /* Returns true if the pattern is contained in the set. False otherwise.
 
+     FIXME(zimbatm): this example doesn't work !!!
+
      Example:
-       matchAttrs { cpu = {}; } { cpu = { bits = 64; }; }
+       sys = mkSystem { }
+       matchAttrs { cpu = { bits = 64; }; } sys
        => true
    */
-  matchAttrs = pattern: attrs: assert isAttrs pattern;
-    fold and true (attrValues (zipAttrsWithNames (attrNames pattern) (n: values:
+  matchAttrs = pattern: attrs:
+    fold or false (attrValues (zipAttrsWithNames (attrNames pattern) (n: values:
       let pat = head values; val = head (tail values); in
       if length values == 1 then false
-      else if isAttrs pat then isAttrs val && matchAttrs pat val
+      else if isAttrs pat then isAttrs val && matchAttrs head values
       else pat == val
     ) [pattern attrs]));
 

lib/composable-derivation.nix

@@ -1,4 +1,4 @@
-{lib, pkgs}:
+{lib, pkgs} :
 let inherit (lib) nv nvs; in
 {
 
@@ -19,7 +19,7 @@ let inherit (lib) nv nvs; in
   # * vim_configurable
   #
   # A minimal example illustrating most features would look like this:
-  # let base = composableDerivation { (fixed: let inherit (fixed.fixed) name in {
+  # let base = composableDerivation { (fixed : let inherit (fixed.fixed) name in {
   #    src = fetchurl {
   #    }
   #    buildInputs = [A];
@@ -39,7 +39,7 @@ let inherit (lib) nv nvs; in
   #
   # issues:
   # * its complicated to understand
-  # * some "features" such as exact merge behaviour are buried in mergeAttrBy
+  # * some "features" such as exact merge behaviour are burried in mergeAttrBy
   #   and defaultOverridableDelayableArgs assuming the default behaviour does
   #   the right thing in the common case
   # * Eelco once said using such fix style functions are slow to evaluate
@@ -48,7 +48,7 @@ let inherit (lib) nv nvs; in
   #   / add patches the way you want without having to declare function arguments
   #
   # nice features:
-  # declaring "optional features" is modular. For instance:
+  # declaring "optional featuers" is modular. For instance:
   #   flags.curl = {
   #     configureFlags = ["--with-curl=${curl.dev}" "--with-curlwrappers"];
   #     buildInputs = [curl openssl];
@@ -79,7 +79,7 @@ let inherit (lib) nv nvs; in
         # consider adding addtional elements by derivation.merge { removeAttrs = ["elem"]; };
         removeAttrs ? ["cfg" "flags"]
 
-      }: (lib.defaultOverridableDelayableArgs ( a: mkDerivation a)
+      }: (lib.defaultOverridableDelayableArgs ( a: mkDerivation a) 
          {
            inherit applyPreTidy removeAttrs;
          }).merge;

lib/customisation.nix

@@ -10,7 +10,7 @@ rec {
 
   /* `overrideDerivation drv f' takes a derivation (i.e., the result
      of a call to the builtin function `derivation') and returns a new
-     derivation in which the attributes of the original are overridden
+     derivation in which the attributes of the original are overriden
      according to the function `f'.  The function `f' is called with
      the original derivation attributes.
 
@@ -51,24 +51,6 @@ rec {
        else { }));
 
 
-  /* `makeOverridable` takes a function from attribute set to attribute set and
-     injects `override` attibute which can be used to override arguments of
-     the function.
-
-       nix-repl> x = {a, b}: { result = a + b; }
-
-       nix-repl> y = lib.makeOverridable x { a = 1; b = 2; }
-
-       nix-repl> y
-       { override = «lambda»; overrideDerivation = «lambda»; result = 3; }
-
-       nix-repl> y.override { a = 10; }
-       { override = «lambda»; overrideDerivation = «lambda»; result = 12; }
-
-     Please refer to "Nixpkgs Contributors Guide" section
-     "<pkg>.overrideDerivation" to learn about `overrideDerivation` and caveats
-     related to its use.
-  */
   makeOverridable = f: origArgs:
     let
       ff = f origArgs;
@@ -185,7 +167,7 @@ rec {
   /* Make a set of packages with a common scope. All packages called
      with the provided `callPackage' will be evaluated with the same
      arguments. Any package in the set may depend on any other. The
-     `overrideScope' function allows subsequent modification of the package
+     `override' function allows subsequent modification of the package
      set in a consistent way, i.e. all packages in the set will be
      called with the overridden packages. The package sets may be
      hierarchical: the packages in the set are called with the scope
@@ -195,7 +177,7 @@ rec {
     let self = f self // {
           newScope = scope: newScope (self // scope);
           callPackage = self.newScope {};
-          overrideScope = g:
+          override = g:
             makeScope newScope
             (self_: let super = f self_; in super // g super self_);
           packages = f;

lib/debug.nix

@@ -20,38 +20,14 @@ rec {
   traceXMLValMarked = str: x: trace (str + builtins.toXML x) x;
 
   # strict trace functions (traced structure is fully evaluated and printed)
-
-  /* `builtins.trace`, but the value is `builtins.deepSeq`ed first. */
   traceSeq = x: y: trace (builtins.deepSeq x x) y;
-
-  /* Like `traceSeq`, but only down to depth n.
-   * This is very useful because lots of `traceSeq` usages
-   * lead to an infinite recursion.
-   */
-  traceSeqN = depth: x: y: with lib;
-    let snip = v: if      isList  v then noQuotes "[…]" v
-                  else if isAttrs v then noQuotes "{…}" v
-                  else v;
-        noQuotes = str: v: { __pretty = const str; val = v; };
-        modify = n: fn: v: if (n == 0) then fn v
-                      else if isList  v then map (modify (n - 1) fn) v
-                      else if isAttrs v then mapAttrs
-                        (const (modify (n - 1) fn)) v
-                      else v;
-    in trace (generators.toPretty { allowPrettyValues = true; }
-               (modify depth snip x)) y;
-
-  /* `traceSeq`, but the same value is traced and returned */
   traceValSeq = v: traceVal (builtins.deepSeq v v);
-  /* `traceValSeq` but with fixed depth */
-  traceValSeqN = depth: v: traceSeqN depth v v;
-
 
   # this can help debug your code as well - designed to not produce thousands of lines
-  traceShowVal = x: trace (showVal x) x;
+  traceShowVal = x : trace (showVal x) x;
   traceShowValMarked = str: x: trace (str + showVal x) x;
-  attrNamesToStr = a: lib.concatStringsSep "; " (map (x: "${x}=") (attrNames a));
-  showVal = x:
+  attrNamesToStr = a : lib.concatStringsSep "; " (map (x : "${x}=") (attrNames a));
+  showVal = x :
       if isAttrs x then
           if x ? outPath then "x is a derivation, name ${if x ? name then x.name else "<no name>"}, { ${attrNamesToStr x} }"
           else "x is attr set { ${attrNamesToStr x} }"
@@ -67,9 +43,9 @@ rec {
 
   # trace the arguments passed to function and its result
   # maybe rewrite these functions in a traceCallXml like style. Then one function is enough
-  traceCall  = n: f: a: let t = n2: x: traceShowValMarked "${n} ${n2}:" x; in t "result" (f (t "arg 1" a));
-  traceCall2 = n: f: a: b: let t = n2: x: traceShowValMarked "${n} ${n2}:" x; in t "result" (f (t "arg 1" a) (t "arg 2" b));
-  traceCall3 = n: f: a: b: c: let t = n2: x: traceShowValMarked "${n} ${n2}:" x; in t "result" (f (t "arg 1" a) (t "arg 2" b) (t "arg 3" c));
+  traceCall  = n : f : a : let t = n2 : x : traceShowValMarked "${n} ${n2}:" x; in t "result" (f (t "arg 1" a));
+  traceCall2 = n : f : a : b : let t = n2 : x : traceShowValMarked "${n} ${n2}:" x; in t "result" (f (t "arg 1" a) (t "arg 2" b));
+  traceCall3 = n : f : a : b : c : let t = n2 : x : traceShowValMarked "${n} ${n2}:" x; in t "result" (f (t "arg 1" a) (t "arg 2" b) (t "arg 3" c));
 
   # FIXME: rename this?
   traceValIfNot = c: x:
@@ -95,7 +71,7 @@ rec {
 
   # create a test assuming that list elements are true
   # usage: { testX = allTrue [ true ]; }
-  testAllTrue = expr: { inherit expr; expected = map (x: true) expr; };
+  testAllTrue = expr : { inherit expr; expected = map (x: true) expr; };
 
   strict = v:
     trace "Warning: strict is deprecated and will be removed in the next release"

lib/default.nix

@@ -1,13 +1,7 @@
-/* Library of low-level helper functions for nix expressions.
- *
- * Please implement (mostly) exhaustive unit tests
- * for new functions in `./tests.nix'.
- */
 let
 
-  # often used, or depending on very little
+  # trivial, often used functions
   trivial = import ./trivial.nix;
-  fixedPoints = import ./fixed-points.nix;
 
   # datatypes
   attrsets = import ./attrsets.nix;
@@ -28,7 +22,8 @@ let
 
   # constants
   licenses = import ./licenses.nix;
-  systems = import ./systems;
+  platforms = import ./platforms.nix;
+  systems = import ./systems.nix;
 
   # misc
   debug = import ./debug.nix;
@@ -39,24 +34,18 @@ let
   sandbox = import ./sandbox.nix;
   fetchers = import ./fetchers.nix;
 
-  # Eval-time filesystem handling
-  filesystem = import ./filesystem.nix;
-
 in
-  { inherit trivial fixedPoints
+  { inherit trivial
             attrsets lists strings stringsWithDeps
             customisation maintainers meta sources
             modules options types
-            licenses systems
+            licenses platforms systems
             debug generators misc
-            sandbox fetchers filesystem;
-
-    # back-compat aliases
-    platforms = systems.doubles;
+            sandbox fetchers;
   }
   # !!! don't include everything at top-level; perhaps only the most
   # commonly used functions.
-  // trivial // fixedPoints
-  // lists // strings // stringsWithDeps // attrsets // sources
+  // trivial // lists // strings // stringsWithDeps // attrsets // sources
   // options // types // meta // debug // misc // modules
+  // systems
   // customisation

lib/deprecated.nix

@@ -16,23 +16,23 @@ rec {
 
   defaultMergeArg = x : y: if builtins.isAttrs y then
     y
-  else
+  else 
     (y x);
   defaultMerge = x: y: x // (defaultMergeArg x y);
-  foldArgs = merger: f: init: x:
-    let arg = (merger init (defaultMergeArg init x));
-        # now add the function with composed args already applied to the final attrs
-        base = (setAttrMerge "passthru" {} (f arg)
-                        ( z: z // rec {
-                            function = foldArgs merger f arg;
-                            args = (lib.attrByPath ["passthru" "args"] {} z) // x;
+  foldArgs = merger: f: init: x: 
+    let arg=(merger init (defaultMergeArg init x));
+      # now add the function with composed args already applied to the final attrs
+        base = (setAttrMerge "passthru" {} (f arg) 
+                        ( z : z // rec { 
+                          function = foldArgs merger f arg; 
+			  args = (lib.attrByPath ["passthru" "args"] {} z) // x;
                           } ));
-        withStdOverrides = base // {
-          override = base.passthru.function;
-        };
+	withStdOverrides = base // {
+	   override = base.passthru.function;
+	   } ;
         in
-          withStdOverrides;
-
+	withStdOverrides;
+    
 
   # predecessors: proposed replacement for applyAndFun (which has a bug cause it merges twice)
   # the naming "overridableDelayableArgs" tries to express that you can
@@ -49,35 +49,35 @@ rec {
   #
   # examples: see test cases "res" below;
   overridableDelayableArgs =
-          f:        # the function applied to the arguments
-          initial:  # you pass attrs, the functions below are passing a function taking the fix argument
+          f :        # the function applied to the arguments
+          initial :  # you pass attrs, the functions below are passing a function taking the fix argument
     let
         takeFixed = if isFunction initial then initial else (fixed : initial); # transform initial to an expression always taking the fixed argument
-        tidy = args:
+        tidy = args : 
             let # apply all functions given in "applyPreTidy" in sequence
-                applyPreTidyFun = fold ( n: a: x: n ( a x ) ) lib.id (maybeAttr "applyPreTidy" [] args);
+                applyPreTidyFun = fold ( n : a : x : n ( a x ) ) lib.id (maybeAttr "applyPreTidy" [] args);
             in removeAttrs (applyPreTidyFun args) ( ["applyPreTidy"] ++ (maybeAttr  "removeAttrs" [] args) ); # tidy up args before applying them
-        fun = n: x:
-            let newArgs = fixed:
-                    let args = takeFixed fixed;
-                        mergeFun = args.${n};
-                    in if isAttrs x then (mergeFun args x)
-                       else assert isFunction x;
-                            mergeFun args (x ( args // { inherit fixed; }));
-            in overridableDelayableArgs f newArgs;
+        fun = n : x :
+             let newArgs = fixed :
+                     let args = takeFixed fixed; 
+                         mergeFun = args.${n};
+                     in if isAttrs x then (mergeFun args x)
+                        else assert isFunction x;
+                             mergeFun args (x ( args // { inherit fixed; }));
+             in overridableDelayableArgs f newArgs;
     in
     (f (tidy (lib.fix takeFixed))) // {
       merge   = fun "mergeFun";
       replace = fun "keepFun";
     };
-  defaultOverridableDelayableArgs = f:
+  defaultOverridableDelayableArgs = f : 
       let defaults = {
             mergeFun = mergeAttrByFunc; # default merge function. merge strategie (concatenate lists, strings) is given by mergeAttrBy
-            keepFun = a: b: { inherit (a) removeAttrs mergeFun keepFun mergeAttrBy; } // b; # even when using replace preserve these values
+            keepFun = a : b : { inherit (a) removeAttrs mergeFun keepFun mergeAttrBy; } // b; # even when using replace preserve these values
             applyPreTidy = []; # list of functions applied to args before args are tidied up (usage case : prepareDerivationArgs)
             mergeAttrBy = mergeAttrBy // {
-              applyPreTidy = a: b: a ++ b;
-              removeAttrs = a: b: a ++ b;
+              applyPreTidy = a : b : a ++ b;
+              removeAttrs = a : b: a ++ b;
             };
             removeAttrs = ["mergeFun" "keepFun" "mergeAttrBy" "removeAttrs" "fixed" ]; # before applying the arguments to the function make sure these names are gone
           };
@@ -86,7 +86,7 @@ rec {
 
 
   # rec { # an example of how composedArgsAndFun can be used
-  #  a  = composedArgsAndFun (x: x) { a = ["2"]; meta = { d = "bar";}; };
+  #  a  = composedArgsAndFun (x : x) { a = ["2"]; meta = { d = "bar";}; };
   #  # meta.d will be lost ! It's your task to preserve it (eg using a merge function)
   #  b  = a.passthru.function { a = [ "3" ]; meta = { d2 = "bar2";}; };
   #  # instead of passing/ overriding values you can use a merge function:
@@ -119,7 +119,7 @@ rec {
     else if val == true || val == false then false
     else null;
 
-
+    
   # Return true only if there is an attribute and it is true.
   checkFlag = attrSet: name:
         if name == "true" then true else
@@ -134,29 +134,29 @@ rec {
   ( attrByPath [name] (if checkFlag attrSet name then true else
         if argList == [] then null else
         let x = builtins.head argList; in
-                if (head x) == name then
+                if (head x) == name then 
                         (head (tail x))
-                else (getValue attrSet
+                else (getValue attrSet 
                         (tail argList) name)) attrSet );
 
-
+                        
   # Input : attrSet, [[name default] ...], [ [flagname reqs..] ... ]
   # Output : are reqs satisfied? It's asserted.
-  checkReqs = attrSet: argList: condList:
+  checkReqs = attrSet : argList : condList :
   (
-    fold lib.and true
-      (map (x: let name = (head x); in
-
-        ((checkFlag attrSet name) ->
+    fold lib.and true 
+      (map (x: let name = (head x) ; in
+        
+        ((checkFlag attrSet name) -> 
         (fold lib.and true
         (map (y: let val=(getValue attrSet argList y); in
-                (val!=null) && (val!=false))
-        (tail x))))) condList));
-
+                (val!=null) && (val!=false)) 
+        (tail x))))) condList)) ;
+        
 
   # This function has O(n^2) performance.
-  uniqList = { inputList, acc ? [] }:
-    let go = xs: acc:
+  uniqList = {inputList, acc ? []} :
+    let go = xs : acc :
              if xs == []
              then []
              else let x = head xs;
@@ -164,26 +164,26 @@ rec {
                   in y ++ go (tail xs) (y ++ acc);
     in go inputList acc;
 
-  uniqListExt = { inputList,
-                  outputList ? [],
-                  getter ? (x: x),
-                  compare ? (x: y: x==y) }:
+  uniqListExt = {inputList, outputList ? [],
+    getter ? (x : x), compare ? (x: y: x==y)}:
         if inputList == [] then outputList else
-        let x = head inputList;
-            isX = y: (compare (getter y) (getter x));
-            newOutputList = outputList ++
-                (if any isX outputList then [] else [x]);
-        in uniqListExt { outputList = newOutputList;
-                         inputList = (tail inputList);
-                         inherit getter compare;
-                       };
+        let x=head inputList; 
+        isX = y: (compare (getter y) (getter x));
+        newOutputList = outputList ++
+         (if any isX outputList then [] else [x]);
+        in uniqListExt {outputList=newOutputList; 
+                inputList = (tail inputList);
+                inherit getter compare;
+                };
 
+
+                
   condConcat = name: list: checker:
         if list == [] then name else
-        if checker (head list) then
-                condConcat
-                        (name + (head (tail list)))
-                        (tail (tail list))
+        if checker (head list) then 
+                condConcat 
+                        (name + (head (tail list))) 
+                        (tail (tail list)) 
                         checker
         else condConcat
                 name (tail (tail list)) checker;
@@ -202,12 +202,12 @@ rec {
     in
       work startSet [] [];
 
-  innerModifySumArgs = f: x: a: b: if b == null then (f a b) // x else
+  innerModifySumArgs = f: x: a: b: if b == null then (f a b) // x else 
         innerModifySumArgs f x (a // b);
   modifySumArgs = f: x: innerModifySumArgs f x {};
 
 
-  innerClosePropagation = acc: xs:
+  innerClosePropagation = acc : xs :
     if xs == []
     then acc
     else let y  = head xs;
@@ -227,45 +227,45 @@ rec {
   closePropagation = list: (uniqList {inputList = (innerClosePropagation [] list);});
 
   # calls a function (f attr value ) for each record item. returns a list
-  mapAttrsFlatten = f: r: map (attr: f attr r.${attr}) (attrNames r);
+  mapAttrsFlatten = f : r : map (attr: f attr r.${attr}) (attrNames r);
 
   # attribute set containing one attribute
-  nvs = name: value: listToAttrs [ (nameValuePair name value) ];
+  nvs = name : value : listToAttrs [ (nameValuePair name value) ];
   # adds / replaces an attribute of an attribute set
-  setAttr = set: name: v: set // (nvs name v);
+  setAttr = set : name : v : set // (nvs name v);
 
   # setAttrMerge (similar to mergeAttrsWithFunc but only merges the values of a particular name)
-  # setAttrMerge "a" [] { a = [2];} (x: x ++ [3]) -> { a = [2 3]; }
-  # setAttrMerge "a" [] {         } (x: x ++ [3]) -> { a = [  3]; }
-  setAttrMerge = name: default: attrs: f:
+  # setAttrMerge "a" [] { a = [2];} (x : x ++ [3]) -> { a = [2 3]; } 
+  # setAttrMerge "a" [] {         } (x : x ++ [3]) -> { a = [  3]; }
+  setAttrMerge = name : default : attrs : f :
     setAttr attrs name (f (maybeAttr name default attrs));
 
-  # Using f = a: b = b the result is similar to //
+  # Using f = a : b = b the result is similar to //
   # merge attributes with custom function handling the case that the attribute
   # exists in both sets
-  mergeAttrsWithFunc = f: set1: set2:
-    fold (n: set: if set ? ${n}
+  mergeAttrsWithFunc = f : set1 : set2 :
+    fold (n: set : if set ? ${n}
                         then setAttr set n (f set.${n} set2.${n})
                         else set )
            (set2 // set1) (attrNames set2);
 
   # merging two attribute set concatenating the values of same attribute names
   # eg { a = 7; } {  a = [ 2 3 ]; } becomes { a = [ 7 2 3 ]; }
-  mergeAttrsConcatenateValues = mergeAttrsWithFunc ( a: b: (toList a) ++ (toList b) );
+  mergeAttrsConcatenateValues = mergeAttrsWithFunc ( a : b : (toList a) ++ (toList b) );
 
-  # merges attributes using //, if a name exists in both attributes
+  # merges attributes using //, if a name exisits in both attributes
   # an error will be triggered unless its listed in mergeLists
   # so you can mergeAttrsNoOverride { buildInputs = [a]; } { buildInputs = [a]; } {} to get
   # { buildInputs = [a b]; }
-  # merging buildPhase doesn't really make sense. The cases will be rare where appending /prefixing will fit your needs?
+  # merging buildPhase does'nt really make sense. The cases will be rare where appending /prefixing will fit your needs?
   # in these cases the first buildPhase will override the second one
   # ! deprecated, use mergeAttrByFunc instead
   mergeAttrsNoOverride = { mergeLists ? ["buildInputs" "propagatedBuildInputs"],
                            overrideSnd ? [ "buildPhase" ]
-                         }: attrs1: attrs2:
-    fold (n: set:
+                         } : attrs1 : attrs2 :
+    fold (n: set : 
         setAttr set n ( if set ? ${n}
-            then # merge
+            then # merge 
               if elem n mergeLists # attribute contains list, merge them by concatenating
                 then attrs2.${n} ++ attrs1.${n}
               else if elem n overrideSnd
@@ -286,14 +286,14 @@ rec {
   # { mergeAttrsBy = [...]; buildInputs = [ a b c d ]; }
   # is used by prepareDerivationArgs, defaultOverridableDelayableArgs and can be used when composing using
   # foldArgs, composedArgsAndFun or applyAndFun. Example: composableDerivation in all-packages.nix
-  mergeAttrByFunc = x: y:
+  mergeAttrByFunc = x : y :
     let
-          mergeAttrBy2 = { mergeAttrBy = lib.mergeAttrs; }
+          mergeAttrBy2 = { mergeAttrBy=lib.mergeAttrs; }
                       // (maybeAttr "mergeAttrBy" {} x)
                       // (maybeAttr "mergeAttrBy" {} y); in
     fold lib.mergeAttrs {} [
       x y
-      (mapAttrs ( a: v: # merge special names using given functions
+      (mapAttrs ( a : v : # merge special names using given functions
           if x ? ${a}
              then if y ? ${a}
                then v x.${a} y.${a} # both have attr, use merge func
@@ -309,19 +309,58 @@ rec {
   mergeAttrsByFuncDefaults = foldl mergeAttrByFunc { inherit mergeAttrBy; };
   mergeAttrsByFuncDefaultsClean = list: removeAttrs (mergeAttrsByFuncDefaults list) ["mergeAttrBy"];
 
+  # merge attrs based on version key into mkDerivation args, see mergeAttrBy to learn about smart merge defaults
+  #
+  # This function is best explained by an example:
+  #
+  #     {version ? "2.x"} :
+  #
+  #     mkDerivation (mergeAttrsByVersion "package-name" version 
+  #       { # version specific settings
+  #         "git" = { src = ..; preConfigre = "autogen.sh"; buildInputs = [automake autoconf libtool];  };
+  #         "2.x" = { src = ..; };
+  #       }
+  #       {  // shared settings
+  #          buildInputs = [ common build inputs ];
+  #          meta = { .. }
+  #       }
+  #     )
+  #
+  # Please note that e.g. Eelco Dolstra usually prefers having one file for
+  # each version. On the other hand there are valuable additional design goals
+  #  - readability
+  #  - do it once only
+  #  - try to avoid duplication
+  #
+  # Marc Weber and Michael Raskin sometimes prefer keeping older
+  # versions around for testing and regression tests - as long as its cheap to
+  # do so.
+  #
+  # Very often it just happens that the "shared" code is the bigger part.
+  # Then using this function might be appropriate.
+  #
+  # Be aware that its easy to cause recompilations in all versions when using
+  # this function - also if derivations get too complex splitting into multiple
+  # files is the way to go.
+  #
+  # See misc.nix -> versionedDerivation
+  # discussion: nixpkgs: pull/310
+  mergeAttrsByVersion = name: version: attrsByVersion: base:
+    mergeAttrsByFuncDefaultsClean [ { name = "${name}-${version}"; } base (maybeAttr version (throw "bad version ${version} for ${name}") attrsByVersion)];
+
   # sane defaults (same name as attr name so that inherit can be used)
   mergeAttrBy = # { buildInputs = concatList; [...]; passthru = mergeAttr; [..]; }
-    listToAttrs (map (n: nameValuePair n lib.concat)
+    listToAttrs (map (n : nameValuePair n lib.concat)
       [ "nativeBuildInputs" "buildInputs" "propagatedBuildInputs" "configureFlags" "prePhases" "postAll" "patches" ])
-    // listToAttrs (map (n: nameValuePair n lib.mergeAttrs) [ "passthru" "meta" "cfg" "flags" ])
-    // listToAttrs (map (n: nameValuePair n (a: b: "${a}\n${b}") ) [ "preConfigure" "postInstall" ])
+    // listToAttrs (map (n : nameValuePair n lib.mergeAttrs) [ "passthru" "meta" "cfg" "flags" ])
+    // listToAttrs (map (n : nameValuePair n (a: b: "${a}\n${b}") ) [ "preConfigure" "postInstall" ])
   ;
 
   # prepareDerivationArgs tries to make writing configurable derivations easier
   # example:
   #  prepareDerivationArgs {
   #    mergeAttrBy = {
-  #       myScript = x: y: x ++ "\n" ++ y;
+  #       myScript = x : y : x ++ "\n" ++ y;
   #    };
   #    cfg = {
   #      readlineSupport = true;
@@ -353,10 +392,10 @@ rec {
   # TODO use args.mergeFun here as well?
   prepareDerivationArgs = args:
     let args2 = { cfg = {}; flags = {}; } // args;
-        flagName = name: "${name}Support";
-        cfgWithDefaults = (listToAttrs (map (n: nameValuePair (flagName n) false) (attrNames args2.flags)))
+        flagName = name : "${name}Support";
+        cfgWithDefaults = (listToAttrs (map (n : nameValuePair (flagName n) false) (attrNames args2.flags)))
                           // args2.cfg;
-        opts = attrValues (mapAttrs (a: v:
+        opts = attrValues (mapAttrs (a : v :
                 let v2 = if v ? set || v ? unset then v else { set = v; };
                     n = if cfgWithDefaults.${flagName a} then "set" else "unset";
                     attr = maybeAttr n {} v2; in
@@ -381,12 +420,4 @@ rec {
       else if isInt x then "int"
       else "string";
 
-  /* deprecated:
-
-     For historical reasons, imap has an index starting at 1.
-
-     But for consistency with the rest of the library we want an index
-     starting at zero.
-  */
-  imap = imap1;
 }

lib/fetchers.nix

@@ -1,4 +1,4 @@
-# snippets that can be shared by multiple fetchers (pkgs/build-support)
+# snippets that can be shared by mutliple fetchers (pkgs/build-support)
 {
 
   proxyImpureEnvVars = [

lib/filesystem.nix

@@ -1,44 +0,0 @@
-{ # haskellPathsInDir : Path -> Map String Path
-  # A map of all haskell packages defined in the given path,
-  # identified by having a cabal file with the same name as the
-  # directory itself.
-  haskellPathsInDir = root:
-    let # Files in the root
-        root-files = builtins.attrNames (builtins.readDir root);
-        # Files with their full paths
-        root-files-with-paths =
-          map (file:
-            { name = file; value = root + "/${file}"; }
-          ) root-files;
-        # Subdirectories of the root with a cabal file.
-        cabal-subdirs =
-          builtins.filter ({ name, value }:
-            builtins.pathExists (value + "/${name}.cabal")
-          ) root-files-with-paths;
-    in builtins.listToAttrs cabal-subdirs;
-  # locateDominatingFile :  RegExp
-  #                      -> Path
-  #                      -> Nullable { path : Path;
-  #                                    matches : [ MatchResults ];
-  #                                  }
-  # Find the first directory containing a file matching 'pattern'
-  # upward from a given 'file'.
-  # Returns 'null' if no directories contain a file matching 'pattern'.
-  locateDominatingFile = pattern: file:
-    let go = path:
-          let files = builtins.attrNames (builtins.readDir path);
-              matches = builtins.filter (match: match != null)
-                          (map (builtins.match pattern) files);
-          in
-            if builtins.length matches != 0
-              then { inherit path matches; }
-              else if path == /.
-                then null
-                else go (dirOf path);
-        parent = dirOf file;
-        isDir =
-          let base = baseNameOf file;
-              type = (builtins.readDir parent).${base} or null;
-          in file == /. || type == "directory";
-    in go (if isDir then file else parent);
-}

lib/fixed-points.nix

@@ -1,78 +0,0 @@
-rec {
-  # Compute the fixed point of the given function `f`, which is usually an
-  # attribute set that expects its final, non-recursive representation as an
-  # argument:
-  #
-  #     f = self: { foo = "foo"; bar = "bar"; foobar = self.foo + self.bar; }
-  #
-  # Nix evaluates this recursion until all references to `self` have been
-  # resolved. At that point, the final result is returned and `f x = x` holds:
-  #
-  #     nix-repl> fix f
-  #     { bar = "bar"; foo = "foo"; foobar = "foobar"; }
-  #
-  #  Type: fix :: (a -> a) -> a
-  #
-  # See https://en.wikipedia.org/wiki/Fixed-point_combinator for further
-  # details.
-  fix = f: let x = f x; in x;
-
-  # A variant of `fix` that records the original recursive attribute set in the
-  # result. This is useful in combination with the `extends` function to
-  # implement deep overriding. See pkgs/development/haskell-modules/default.nix
-  # for a concrete example.
-  fix' = f: let x = f x // { __unfix__ = f; }; in x;
-
-  # Modify the contents of an explicitly recursive attribute set in a way that
-  # honors `self`-references. This is accomplished with a function
-  #
-  #     g = self: super: { foo = super.foo + " + "; }
-  #
-  # that has access to the unmodified input (`super`) as well as the final
-  # non-recursive representation of the attribute set (`self`). `extends`
-  # differs from the native `//` operator insofar as that it's applied *before*
-  # references to `self` are resolved:
-  #
-  #     nix-repl> fix (extends g f)
-  #     { bar = "bar"; foo = "foo + "; foobar = "foo + bar"; }
-  #
-  # The name of the function is inspired by object-oriented inheritance, i.e.
-  # think of it as an infix operator `g extends f` that mimics the syntax from
-  # Java. It may seem counter-intuitive to have the "base class" as the second
-  # argument, but it's nice this way if several uses of `extends` are cascaded.
-  extends = f: rattrs: self: let super = rattrs self; in super // f self super;
-
-  # Compose two extending functions of the type expected by 'extends'
-  # into one where changes made in the first are available in the
-  # 'super' of the second
-  composeExtensions =
-    f: g: self: super:
-      let fApplied = f self super;
-          super' = super // fApplied;
-      in fApplied // g self super';
-
-  # Create an overridable, recursive attribute set. For example:
-  #
-  #     nix-repl> obj = makeExtensible (self: { })
-  #
-  #     nix-repl> obj
-  #     { __unfix__ = «lambda»; extend = «lambda»; }
-  #
-  #     nix-repl> obj = obj.extend (self: super: { foo = "foo"; })
-  #
-  #     nix-repl> obj
-  #     { __unfix__ = «lambda»; extend = «lambda»; foo = "foo"; }
-  #
-  #     nix-repl> obj = obj.extend (self: super: { foo = super.foo + " + "; bar = "bar"; foobar = self.foo + self.bar; })
-  #
-  #     nix-repl> obj
-  #     { __unfix__ = «lambda»; bar = "bar"; extend = «lambda»; foo = "foo + "; foobar = "foo + bar"; }
-  makeExtensible = makeExtensibleWithCustomName "extend";
-
-  # Same as `makeExtensible` but the name of the extending attribute is
-  # customized.
-  makeExtensibleWithCustomName = extenderName: rattrs:
-    fix' rattrs // {
-      ${extenderName} = f: makeExtensibleWithCustomName extenderName (extends f rattrs);
-   };
-}

lib/generators.nix

@@ -90,41 +90,4 @@ rec {
     * parsers as well.
     */
   toYAML = {}@args: toJSON args;
-
-  /* Pretty print a value, akin to `builtins.trace`.
-    * Should probably be a builtin as well.
-    */
-  toPretty = {
-    /* If this option is true, attrsets like { __pretty = fn; val = …; }
-       will use fn to convert val to a pretty printed representation.
-       (This means fn is type Val -> String.) */
-    allowPrettyValues ? false
-  }@args: v: with builtins;
-    if      isInt      v then toString v
-    else if isBool     v then (if v == true then "true" else "false")
-    else if isString   v then "\"" + v + "\""
-    else if null ==    v then "null"
-    else if isFunction v then
-      let fna = functionArgs v;
-          showFnas = concatStringsSep "," (libAttr.mapAttrsToList
-                       (name: hasDefVal: if hasDefVal then "(${name})" else name)
-                       fna);
-      in if fna == {}    then "<λ>"
-                         else "<λ:{${showFnas}}>"
-    else if isList     v then "[ "
-        + libStr.concatMapStringsSep " " (toPretty args) v
-      + " ]"
-    else if isAttrs    v then
-      # apply pretty values if allowed
-      if attrNames v == [ "__pretty" "val" ] && allowPrettyValues
-         then v.__pretty v.val
-      # TODO: there is probably a better representation?
-      else if v ? type && v.type == "derivation" then "<δ>"
-      else "{ "
-          + libStr.concatStringsSep " " (libAttr.mapAttrsToList
-              (name: value:
-                "${toPretty args name} = ${toPretty args value};") v)
-        + " }"
-    else "toPretty: should never happen (v = ${v})";
-
 }

lib/licenses.nix

@@ -45,11 +45,6 @@ lib.mapAttrs (n: v: v // { shortName = n; }) rec {
     fullName = "Apple Public Source License 2.0";
   };
 
-  arphicpl = {
-    fullName = "Arphic Public License";
-    url = https://www.freedesktop.org/wiki/Arphic_Public_License/;
-  };
-
   artistic1 = spdx {
     spdxId = "Artistic-1.0";
     fullName = "Artistic License 1.0";
@@ -362,11 +357,6 @@ lib.mapAttrs (n: v: v // { shortName = n; }) rec {
     fullName = "Lucent Public License v1.02";
   };
 
-  miros = {
-    fullname = "MirOS License";
-    url = https://opensource.org/licenses/MirOS;
-  };
-
   # spdx.org does not (yet) differentiate between the X11 and Expat versions
   # for details see http://en.wikipedia.org/wiki/MIT_License#Various_versions
   mit = spdx {
@@ -536,22 +526,17 @@ lib.mapAttrs (n: v: v // { shortName = n; }) rec {
     fullName = "Do What The F*ck You Want To Public License";
   };
 
-  wxWindows = spdx {
-    spdxId = "WXwindows";
-    fullName = "wxWindows Library Licence, Version 3.1";
-  };
-
   zlib = spdx {
     spdxId = "Zlib";
     fullName = "zlib License";
   };
 
-  zpl20 = spdx {
+  zpt20 = spdx { # FIXME: why zpt* instead of zpl*
     spdxId = "ZPL-2.0";
     fullName = "Zope Public License 2.0";
   };
 
-  zpl21 = spdx {
+  zpt21 = spdx {
     spdxId = "ZPL-2.1";
     fullName = "Zope Public License 2.1";
   };

lib/lists.nix

@@ -16,22 +16,17 @@ rec {
   */
   singleton = x: [x];
 
-  /* “right fold” a binary function `op' between successive elements of
-     `list' with `nul' as the starting value, i.e.,
-     `foldr op nul [x_1 x_2 ... x_n] == op x_1 (op x_2 ... (op x_n nul))'.
-     Type:
-       foldr :: (a -> b -> b) -> b -> [a] -> b
+  /* "Fold" a binary function `op' between successive elements of
+     `list' with `nul' as the starting value, i.e., `fold op nul [x_1
+     x_2 ... x_n] == op x_1 (op x_2 ... (op x_n nul))'.  (This is
+     Haskell's foldr).
 
      Example:
-       concat = foldr (a: b: a + b) "z"
+       concat = fold (a: b: a + b) "z"
        concat [ "a" "b" "c" ]
        => "abcz"
-       # different types
-       strange = foldr (int: str: toString (int + 1) + str) "a"
-       strange [ 1 2 3 4 ]
-       => "2345a"
   */
-  foldr = op: nul: list:
+  fold = op: nul: list:
     let
       len = length list;
       fold' = n:
@@ -40,25 +35,13 @@ rec {
         else op (elemAt list n) (fold' (n + 1));
     in fold' 0;
 
-  /* `fold' is an alias of `foldr' for historic reasons */
-  # FIXME(Profpatsch): deprecate?
-  fold = foldr;
-
-
-  /* “left fold”, like `foldr', but from the left:
-     `foldl op nul [x_1 x_2 ... x_n] == op (... (op (op nul x_1) x_2) ... x_n)`.
-
-     Type:
-       foldl :: (b -> a -> b) -> b -> [a] -> b
+  /* Left fold: `fold op nul [x_1 x_2 ... x_n] == op (... (op (op nul
+     x_1) x_2) ... x_n)'.
 
      Example:
        lconcat = foldl (a: b: a + b) "z"
        lconcat [ "a" "b" "c" ]
        => "zabc"
-       # different types
-       lstrange = foldl (str: int: str + toString (int + 1)) ""
-       strange [ 1 2 3 4 ]
-       => "a2345"
   */
   foldl = op: nul: list:
     let
@@ -69,7 +52,7 @@ rec {
         else op (foldl' (n - 1)) (elemAt list n);
     in foldl' (length list - 1);
 
-  /* Strict version of `foldl'.
+  /* Strict version of foldl.
 
      The difference is that evaluation is forced upon access. Usually used
      with small whole results (in contract with lazily-generated list or large
@@ -77,21 +60,15 @@ rec {
   */
   foldl' = builtins.foldl' or foldl;
 
-  /* Map with index starting from 0
+  /* Map with index
+
+     FIXME(zimbatm): why does this start to count at 1?
 
      Example:
-       imap0 (i: v: "${v}-${toString i}") ["a" "b"]
-       => [ "a-0" "b-1" ]
-  */
-  imap0 = f: list: genList (n: f n (elemAt list n)) (length list);
-
-  /* Map with index starting from 1
-
-     Example:
-       imap1 (i: v: "${v}-${toString i}") ["a" "b"]
+       imap (i: v: "${v}-${toString i}") ["a" "b"]
        => [ "a-1" "b-2" ]
   */
-  imap1 = f: list: genList (n: f (n + 1) (elemAt list n)) (length list);
+  imap = f: list: genList (n: f (n + 1) (elemAt list n)) (length list);
 
   /* Map and concatenate the result.
 
@@ -163,7 +140,7 @@ rec {
        any isString [ 1 { } ]
        => false
   */
-  any = builtins.any or (pred: foldr (x: y: if pred x then true else y) false);
+  any = builtins.any or (pred: fold (x: y: if pred x then true else y) false);
 
   /* Return true iff function `pred' returns true for all elements of
      `list'.
@@ -174,7 +151,7 @@ rec {
        all (x: x < 3) [ 1 2 3 ]
        => false
   */
-  all = builtins.all or (pred: foldr (x: y: if pred x then y else false) true);
+  all = builtins.all or (pred: fold (x: y: if pred x then y else false) true);
 
   /* Count how many times function `pred' returns true for the elements
      of `list'.
@@ -197,7 +174,7 @@ rec {
   */
   optional = cond: elem: if cond then [elem] else [];
 
-  /* Return a list or an empty list, depending on a boolean value.
+  /* Return a list or an empty list, dependening on a boolean value.
 
      Example:
        optionals true [ 2 3 ]
@@ -242,7 +219,7 @@ rec {
        => { right = [ 5 3 4 ]; wrong = [ 1 2 ]; }
   */
   partition = builtins.partition or (pred:
-    foldr (h: t:
+    fold (h: t:
       if pred h
       then { right = [h] ++ t.right; wrong = t.wrong; }
       else { right = t.right; wrong = [h] ++ t.wrong; }
@@ -477,12 +454,4 @@ rec {
   */
   subtractLists = e: filter (x: !(elem x e));
 
-  /* Test if two lists have no common element.
-     It should be slightly more efficient than (intersectLists a b == [])
-  */
-  mutuallyExclusive = a: b:
-    (builtins.length a) == 0 ||
-    (!(builtins.elem (builtins.head a) b) &&
-     mutuallyExclusive (builtins.tail a) b);
-
 }

lib/maintainers.nix

@@ -14,9 +14,7 @@
   aboseley = "Adam Boseley <adam.boseley@gmail.com>";
   abuibrahim = "Ruslan Babayev <ruslan@babayev.com>";
   acowley = "Anthony Cowley <acowley@gmail.com>";
-  adelbertc = "Adelbert Chang <adelbertc@gmail.com>";
   adev = "Adrien Devresse <adev@adev.name>";
-  adisbladis = "Adam Hose <adis@blad.is>";
   Adjective-Object = "Maxwell Huang-Hobbs <mhuan13@gmail.com>";
   adnelson = "Allen Nelson <ithinkican@gmail.com>";
   adolfogc = "Adolfo E. García Castro <adolfo.garcia.cr@gmail.com>";
@@ -26,14 +24,12 @@
   aforemny = "Alexander Foremny <alexanderforemny@googlemail.com>";
   afranchuk = "Alex Franchuk <alex.franchuk@gmail.com>";
   aherrmann = "Andreas Herrmann <andreash87@gmx.ch>";
-  ahmedtd = "Taahir Ahmed <ahmed.taahir@gmail.com>";
   ak = "Alexander Kjeldaas <ak@formalprivacy.com>";
   akaWolf = "Artjom Vejsel <akawolf0@gmail.com>";
   akc = "Anders Claesson <akc@akc.is>";
   algorith = "Dries Van Daele <dries_van_daele@telenet.be>";
   alibabzo = "Alistair Bill <alistair.bill@gmail.com>";
   all = "Nix Committers <nix-commits@lists.science.uu.nl>";
-  alunduil = "Alex Brandt <alunduil@alunduil.com>";
   ambrop72 = "Ambroz Bizjak <ambrop7@gmail.com>";
   amiddelk = "Arie Middelkoop <amiddelk@gmail.com>";
   amiloradovsky = "Andrew Miloradovsky <miloradovsky@gmail.com>";
@@ -44,9 +40,7 @@
   andrewrk = "Andrew Kelley <superjoe30@gmail.com>";
   andsild = "Anders Sildnes <andsild@gmail.com>";
   aneeshusa = "Aneesh Agrawal <aneeshusa@gmail.com>";
-  ankhers = "Justin Wood <justin.k.wood@gmail.com>";
   antono = "Antono Vasiljev <self@antono.info>";
-  apeschar = "Albert Peschar <albert@peschar.net>";
   apeyroux = "Alexandre Peyroux <alex@px.io>";
   ardumont = "Antoine R. Dumont <eniotna.t@gmail.com>";
   aristid = "Aristid Breitkreuz <aristidb@gmail.com>";
@@ -64,9 +58,8 @@
   bachp = "Pascal Bach <pascal.bach@nextrem.ch>";
   badi = "Badi' Abdul-Wahid <abdulwahidc@gmail.com>";
   balajisivaraman = "Balaji Sivaraman<sivaraman.balaji@gmail.com>";
-  barrucadu = "Michael Walker <mike@barrucadu.co.uk>";
-  basvandijk = "Bas van Dijk <v.dijk.bas@gmail.com>";
   Baughn = "Svein Ove Aas <sveina@gmail.com>";
+  bbenoist = "Baptist BENOIST <return_0@live.com>";
   bcarrell = "Brandon Carrell <brandoncarrell@gmail.com>";
   bcdarwin = "Ben Darwin <bcdarwin@gmail.com>";
   bdimcheff = "Brandon Dimcheff <brandon@dimcheff.com>";
@@ -75,12 +68,9 @@
   benwbooth = "Ben Booth <benwbooth@gmail.com>";
   berdario = "Dario Bertini <berdario@gmail.com>";
   bergey = "Daniel Bergey <bergey@teallabs.org>";
-  bhipple = "Benjamin Hipple <bhipple@protonmail.com>";
-  binarin = "Alexey Lebedeff <binarin@binarin.ru>";
   bjg = "Brian Gough <bjg@gnu.org>";
   bjornfor = "Bjørn Forsman <bjorn.forsman@gmail.com>";
   bluescreen303 = "Mathijs Kwik <mathijs@bluescreen303.nl>";
-  bobakker = "Bo Bakker <bobakk3r@gmail.com>";
   bobvanderlinden = "Bob van der Linden <bobvanderlinden@gmail.com>";
   bodil = "Bodil Stokke <nix@bodil.org>";
   boothead = "Ben Ford <ben@perurbis.com>";
@@ -90,24 +80,19 @@
   bstrik = "Berno Strik <dutchman55@gmx.com>";
   bzizou = "Bruno Bzeznik <Bruno@bzizou.net>";
   c0dehero = "CodeHero <codehero@nerdpol.ch>";
-  calbrecht = "Christian Albrecht <christian.albrecht@mayflower.de>";
   calrama = "Moritz Maxeiner <moritz@ucworks.org>";
-  calvertvl = "Victor Calvert <calvertvl@gmail.com>";
   campadrenalin = "Philip Horger <campadrenalin@gmail.com>";
   canndrew = "Andrew Cann <shum@canndrew.org>";
   carlsverre = "Carl Sverre <accounts@carlsverre.com>";
-  casey = "Casey Rodarmor <casey@rodarmor.net>";
-  caugner = "Claas Augner <nixos@caugner.de>";
   cdepillabout = "Dennis Gosnell <cdep.illabout@gmail.com>";
   cfouche = "Chaddaï Fouché <chaddai.fouche@gmail.com>";
-  changlinli = "Changlin Li <mail@changlinli.com>";
   chaoflow = "Florian Friesdorf <flo@chaoflow.net>";
   chattered = "Phil Scott <me@philscotted.com>";
+  changlinli = "Changlin Li <mail@changlinli.com>";
   choochootrain = "Hurshal Patel <hurshal@imap.cc>";
   chris-martin = "Chris Martin <ch.martin@gmail.com>";
   chrisjefferson = "Christopher Jefferson <chris@bubblescope.net>";
   christopherpoole = "Christopher Mark Poole <mail@christopherpoole.net>";
-  ciil = "Simon Lackerbauer <simon@lackerbauer.com>";
   ckampka = "Christian Kampka <christian@kampka.net>";
   cko = "Christine Koppelt <christine.koppelt@gmail.com>";
   cleverca22 = "Michael Bishop <cleverca22@gmail.com>";
@@ -117,7 +102,6 @@
   codsl = "codsl <codsl@riseup.net>";
   codyopel = "Cody Opel <codyopel@gmail.com>";
   colemickens = "Cole Mickens <cole.mickens@gmail.com>";
-  colescott = "Cole Scott <colescottsf@gmail.com>";
   copumpkin = "Dan Peebles <pumpkingod@gmail.com>";
   corngood = "David McFarland <corngood@gmail.com>";
   coroa = "Jonas Hörsch <jonas@chaoflow.net>";
@@ -140,35 +124,25 @@
   dbrock = "Daniel Brockman <daniel@brockman.se>";
   deepfire = "Kosyrev Serge <_deepfire@feelingofgreen.ru>";
   demin-dmitriy = "Dmitriy Demin <demindf@gmail.com>";
-  derchris = "Christian Gerbrandt <derchris@me.com>";
   DerGuteMoritz = "Moritz Heidkamp <moritz@twoticketsplease.de>";
-  dermetfan = "Robin Stumm <serverkorken@gmail.com>";
   DerTim1 = "Tim Digel <tim.digel@active-group.de>";
   desiderius = "Didier J. Devroye <didier@devroye.name>";
   devhell = "devhell <\"^\"@regexmail.net>";
   dezgeg = "Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>";
-  dfordivam = "Divam <dfordivam+nixpkgs@gmail.com>";
   dfoxfranke = "Daniel Fox Franke <dfoxfranke@gmail.com>";
   dgonyeo = "Derek Gonyeo <derek@gonyeo.com>";
   dipinhora = "Dipin Hora <dipinhora+github@gmail.com>";
-  disassembler = "Samuel Leathers <disasm@gmail.com>";
   dmalikov = "Dmitry Malikov <malikov.d.y@gmail.com>";
-  DmitryTsygankov = "Dmitry Tsygankov <dmitry.tsygankov@gmail.com>";
-  dmjio = "David Johnson <djohnson.m@gmail.com>";
   dochang = "Desmond O. Chang <dochang@gmail.com>";
   domenkozar = "Domen Kozar <domen@dev.si>";
-  dotlambda = "Robert Schütz <rschuetz17@gmail.com>";
   doublec = "Chris Double <chris.double@double.co.nz>";
   dpaetzel = "David Pätzel <david.a.paetzel@gmail.com>";
   drets = "Dmytro Rets <dmitryrets@gmail.com>";
   drewkett = "Andrew Burkett <burkett.andrew@gmail.com>";
-  dsferruzza = "David Sferruzza <david.sferruzza@gmail.com>";
   dtzWill = "Will Dietz <nix@wdtz.org>";
-  dywedir = "Vladyslav M. <dywedir@protonmail.ch>";
   e-user = "Alexander Kahl <nixos@sodosopa.io>";
   ebzzry = "Rommel Martinez <ebzzry@gmail.com>";
   edanaher = "Evan Danaher <nixos@edanaher.net>";
-  edef = "edef <edef@edef.eu>";
   ederoyd46 = "Matthew Brown <matt@ederoyd.co.uk>";
   eduarrrd = "Eduard Bachmakov <e.bachmakov@gmail.com>";
   edwtjo = "Edward Tjörnhammar <ed@cflags.cc>";
@@ -176,13 +150,10 @@
   ehegnes = "Eric Hegnes <eric.hegnes@gmail.com>";
   ehmry = "Emery Hemingway <emery@vfemail.net>";
   eikek = "Eike Kettner <eike.kettner@posteo.de>";
-  ekleog = "Leo Gaspard <leo@gaspard.io>";
   elasticdog = "Aaron Bull Schaefer <aaron@elasticdog.com>";
   eleanor = "Dejan Lukan <dejan@proteansec.com>";
-  elijahcaine = "Elijah Caine <elijahcainemv@gmail.com>";
   elitak = "Eric Litak <elitak@gmail.com>";
   ellis = "Ellis Whitehead <nixos@ellisw.net>";
-  eperuffo = "Emanuele Peruffo <info@emanueleperuffo.com>";
   epitrochoid = "Mabry Cervin <mpcervin@uncg.edu>";
   ericbmerritt = "Eric Merritt <eric@afiniate.com>";
   ericsagnes = "Eric Sagnes <eric.sagnes@gmail.com>";
@@ -193,9 +164,7 @@
   exlevan = "Alexey Levan <exlevan@gmail.com>";
   expipiplus1 = "Joe Hermaszewski <nix@monoid.al>";
   fadenb = "Tristan Helmich <tristan.helmich+nixos@gmail.com>";
-  fare = "Francois-Rene Rideau <fahree@gmail.com>";
   falsifian = "James Cook <james.cook@utoronto.ca>";
-  florianjacob = "Florian Jacob <projects+nixos@florianjacob.de>";
   flosse = "Markus Kohlhase <mail@markus-kohlhase.de>";
   fluffynukeit = "Daniel Austin <dan@fluffynukeit.com>";
   fmthoma = "Franz Thoma <f.m.thoma@googlemail.com>";
@@ -209,19 +178,15 @@
   ftrvxmtrx = "Siarhei Zirukin <ftrvxmtrx@gmail.com>";
   funfunctor = "Edward O'Callaghan <eocallaghan@alterapraxis.com>";
   fuuzetsu = "Mateusz Kowalczyk <fuuzetsu@fuuzetsu.co.uk>";
-  fuzzy-id = "Thomas Bach <hacking+nixos@babibo.de>";
   fxfactorial = "Edgar Aroutiounian <edgar.factorial@gmail.com>";
   gal_bolle = "Florent Becker <florent.becker@ens-lyon.org>";
   garbas = "Rok Garbas <rok@garbas.si>";
   garrison = "Jim Garrison <jim@garrison.cc>";
   gavin = "Gavin Rogers <gavin@praxeology.co.uk>";
   gebner = "Gabriel Ebner <gebner@gebner.org>";
-  geistesk = "Alvar Penning <post@0x21.biz>";
-  georgewhewell = "George Whewell <georgerw@gmail.com>";
   gilligan = "Tobias Pflug <tobias.pflug@gmail.com>";
   giogadi = "Luis G. Torres <lgtorres42@gmail.com>";
   gleber = "Gleb Peregud <gleber.p@gmail.com>";
-  glenns = "Glenn Searby <glenn.searby@gmail.com>";
   globin = "Robin Gloster <mail@glob.in>";
   gnidorah = "Alex Ivanov <yourbestfriend@opmbx.org>";
   goibhniu = "Cillian de Róiste <cillian.deroiste@gmail.com>";
@@ -229,7 +194,6 @@
   goodrone = "Andrew Trachenko <goodrone@gmail.com>";
   gpyh = "Yacine Hmito <yacine.hmito@gmail.com>";
   grahamc = "Graham Christensen <graham@grahamc.com>";
-  grburst = "Julius Elias <grburst@openmailbox.org>";
   gridaphobe = "Eric Seidel <eric@seidel.io>";
   guibert = "David Guibert <david.guibert@gmail.com>";
   guillaumekoenig = "Guillaume Koenig <guillaume.edward.koenig@gmail.com>";
@@ -238,54 +202,38 @@
   havvy = "Ryan Scheel <ryan.havvy@gmail.com>";
   hbunke = "Hendrik Bunke <bunke.hendrik@gmail.com>";
   hce = "Hans-Christian Esperer <hc@hcesperer.org>";
-  hectorj = "Hector Jusforgues <hector.jusforgues+nixos@gmail.com>";
-  heel = "Sergii Paryzhskyi <parizhskiy@gmail.com>";
   henrytill = "Henry Till <henrytill@gmail.com>";
-  hhm = "hhm <heehooman+nixpkgs@gmail.com>";
   hinton = "Tom Hinton <t@larkery.com>";
-  hodapp = "Chris Hodapp <hodapp87@gmail.com>";
   hrdinka = "Christoph Hrdinka <c.nix@hrdinka.at>";
-  htr = "Hugo Tavares Reis <hugo@linux.com>";
   iand675 = "Ian Duncan <ian@iankduncan.com>";
   ianwookim = "Ian-Woo Kim <ianwookim@gmail.com>";
   igsha = "Igor Sharonov <igor.sharonov@gmail.com>";
   ikervagyok = "Balázs Lengyel <ikervagyok@gmail.com>";
-  infinisil = "Silvan Mosberger <infinisil@icloud.com>";
   ivan-tkatchev = "Ivan Tkatchev <tkatchev@gmail.com>";
   j-keck = "Jürgen Keck <jhyphenkeck@gmail.com>";
   jagajaga = "Arseniy Seroka <ars.seroka@gmail.com>";
-  jammerful = "jammerful <jammerful@gmail.com>";
-  jansol = "Jan Solanti <jan.solanti@paivola.fi>";
   javaguirre = "Javier Aguirre <contacto@javaguirre.net>";
-  jb55 = "William Casarin <jb55@jb55.com>";
+  jb55 = "William Casarin <bill@casarin.me>";
   jbedo = "Justin Bedő <cu@cua0.org>";
   jcumming = "Jack Cummings <jack@mudshark.org>";
   jdagilliland = "Jason Gilliland <jdagilliland@gmail.com>";
   jefdaj = "Jeffrey David Johnson <jefdaj@gmail.com>";
-  jensbin = "Jens Binkert <jensbin@protonmail.com>";
   jerith666 = "Matt McHenry <github@matt.mchenryfamily.org>";
   jfb = "James Felix Black <james@yamtime.com>";
-  jfrankenau = "Johannes Frankenau <johannes@frankenau.net>";
   jgeerds = "Jascha Geerds <jascha@jgeerds.name>";
   jgertm = "Tim Jaeger <jger.tm@gmail.com>";
   jgillich = "Jakob Gillich <jakob@gillich.me>";
-  jhhuh = "Ji-Haeng Huh <jhhuh.note@gmail.com>";
   jirkamarsik = "Jirka Marsik <jiri.marsik89@gmail.com>";
-  jlesquembre = "José Luis Lafuente <jl@lafuente.me>";
-  jluttine = "Jaakko Luttinen <jaakko.luttinen@iki.fi>";
   joachifm = "Joachim Fasting <joachifm@fastmail.fm>";
   joamaki = "Jussi Maki <joamaki@gmail.com>";
   joelmo = "Joel Moberg <joel.moberg@gmail.com>";
   joelteon = "Joel Taylor <me@joelt.io>";
   johbo = "Johannes Bornhold <johannes@bornhold.name>";
-  johnramsden = "John Ramsden <johnramsden@riseup.net>";
   joko = "Ioannis Koutras <ioannis.koutras@gmail.com>";
   jonafato = "Jon Banafato <jon@jonafato.com>";
   jpbernardy = "Jean-Philippe Bernardy <jeanphilippe.bernardy@gmail.com>";
   jpierre03 = "Jean-Pierre PRUNARET <nix@prunetwork.fr>";
-  jpotier = "Martin Potier <jpo.contributes.to.nixos@marvid.fr>";
   jraygauthier = "Raymond Gauthier <jraygauthier@gmail.com>";
-  jtojnar = "Jan Tojnar <jtojnar@gmail.com>";
   juliendehos = "Julien Dehos <dehos@lisic.univ-littoral.fr>";
   jwiegley = "John Wiegley <johnw@newartisans.com>";
   jwilberding = "Jordan Wilberding <jwilberding@afiniate.com>";
@@ -293,15 +241,12 @@
   kaiha = "Kai Harries <kai.harries@gmail.com>";
   kamilchm = "Kamil Chmielewski <kamil.chm@gmail.com>";
   kampfschlaefer = "Arnold Krille <arnold@arnoldarts.de>";
-  kentjames = "James Kent <jameschristopherkent@gmail.com";
   kevincox = "Kevin Cox <kevincox@kevincox.ca>";
   khumba = "Bryan Gardiner <bog@khumba.net>";
   KibaFox = "Kiba Fox <kiba.fox@foxypossibilities.com>";
   kierdavis = "Kier Davis <kierdavis@gmail.com>";
-  kiloreux = "Kiloreux Emperex <kiloreux@gmail.com>";
   kkallio = "Karn Kallio <tierpluspluslists@gmail.com>";
   knedlsepp = "Josef Kemetmüller <josef.kemetmueller@gmail.com>";
-  konimex = "Muhammad Herdiansyah <herdiansyah@openmailbox.org>";
   koral = "Koral <koral@mailoo.org>";
   kovirobi = "Kovacsics Robert <kovirobi@gmail.com>";
   kragniz = "Louis Taylor <louis@kragniz.eu>";
@@ -322,7 +267,6 @@
   lihop = "Leroy Hopson <nixos@leroy.geek.nz>";
   linquize = "Linquize <linquize@yahoo.com.hk>";
   linus = "Linus Arver <linusarver@gmail.com>";
-  lluchs = "Lukas Werling <lukas.werling@gmail.com>";
   lnl7 = "Daiderd Jordan <daiderd@gmail.com>";
   loskutov = "Ignat Loskutov <ignat.loskutov@gmail.com>";
   lovek323 = "Jason O'Conal <jason@oconal.id.au>";
@@ -330,12 +274,9 @@
   lsix = "Lancelot SIX <lsix@lancelotsix.com>";
   lucas8 = "Luc Chabassier <luc.linux@mailoo.org>";
   ludo = "Ludovic Courtès <ludo@gnu.org>";
-  lufia = "Kyohei Kadota <lufia@lufia.org>";
   luispedro = "Luis Pedro Coelho <luis@luispedro.org>";
   lukego = "Luke Gorrie <luke@snabb.co>";
   lw = "Sergey Sofeychuk <lw@fmap.me>";
-  lyt = "Tim Liou <wheatdoge@gmail.com>";
-  m3tti = "Mathaeus Sander <mathaeus.peter.sander@gmail.com>";
   ma27 = "Maximilian Bosch <maximilian@mbosch.me>";
   madjar = "Georges Dubus <georges.dubus@compiletoi.net>";
   magnetophon = "Bart Brouns <bart@magnetophon.nl>";
@@ -368,9 +309,7 @@
   michaelpj = "Michael Peyton Jones <michaelpj@gmail.com>";
   michalrus = "Michal Rus <m@michalrus.com>";
   michelk = "Michel Kuhlmann <michel@kuhlmanns.info>";
-  midchildan = "midchildan <midchildan+nix@gmail.com>";
   mikefaille = "Michaël Faille <michael@faille.io>";
-  miltador = "Vasiliy Solovey <miltador@yandex.ua>";
   mimadrid = "Miguel Madrid <mimadrid@ucm.es>";
   mingchuan = "Ming Chuan <ming@culpring.com>";
   mirdhyn = "Merlin Gaillard <mirdhyn@gmail.com>";
@@ -386,13 +325,11 @@
   MostAwesomeDude = "Corbin Simpson <cds@corbinsimpson.com>";
   mounium = "Katona László <muoniurn@gmail.com>";
   MP2E = "Cray Elliott <MP2E@archlinux.us>";
-  mpcsh = "Mark Cohen <m@mpc.sh>";
   mpscholten = "Marc Scholten <marc@mpscholten.de>";
   mpsyco = "Francis St-Amour <fr.st-amour@gmail.com>";
   msackman = "Matthew Sackman <matthew@wellquite.org>";
   mschristiansen = "Mikkel Christiansen <mikkel@rheosystems.com>";
   msteen = "Matthijs Steen <emailmatthijs@gmail.com>";
-  mt-caret = "Masayuki Takeda <mtakeda.enigsol@gmail.com>";
   mtreskin = "Max Treskin <zerthurd@gmail.com>";
   mudri = "James Wood <lamudri@gmail.com>";
   muflax = "Stefan Dorn <mail@muflax.com>";
@@ -401,12 +338,10 @@
   nand0p = "Fernando Jose Pando <nando@hex7.com>";
   Nate-Devv = "Nathan Moore <natedevv@gmail.com>";
   nathan-gs = "Nathan Bijnens <nathan@nathan.gs>";
-  nckx = "Tobias Geerinckx-Rice <github@tobias.gr>";
+  nckx = "Tobias Geerinckx-Rice <tobias.geerinckx.rice@gmail.com>";
   ndowens = "Nathan Owens <ndowens04@gmail.com>";
-  neeasade = "Nathan Isom <nathanisom27@gmail.com>";
   nequissimus = "Tim Steinbach <tim@nequissimus.com>";
   nfjinjing = "Jinjing Wang <nfjinjing@gmail.com>";
-  nh2 = "Niklas Hambüchen <mail@nh2.me>";
   nhooyr = "Anmol Sethi <anmol@aubble.com>";
   nickhu = "Nick Hu <me@nickhu.co.uk>";
   nicknovitski = "Nick Novitski <nixpkgs@nicknovitski.com>";
@@ -417,8 +352,6 @@
   notthemessiah = "Brian Cohen <brian.cohen.88@gmail.com>";
   np = "Nicolas Pouillard <np.nix@nicolaspouillard.fr>";
   nslqqq = "Nikita Mikhailov <nslqqq@gmail.com>";
-  nthorne = "Niklas Thörne <notrupertthorne@gmail.com>";
-  nyarly = "Judson Lester <nyarly@gmail.com>";
   obadz = "obadz <obadz-nixos@obadz.com>";
   ocharles = "Oliver Charles <ollie@ocharles.org.uk>";
   odi = "Oliver Dunkl <oliver.dunkl@gmail.com>";
@@ -427,7 +360,6 @@
   okasu = "Okasu <oka.sux@gmail.com>";
   olcai = "Erik Timan <dev@timan.info>";
   olejorgenb = "Ole Jørgen Brønner <olejorgenb@yahoo.no>";
-  olynch = "Owen Lynch <owen@olynch.me>";
   orbekk = "KJ Ørbekk <kjetil.orbekk@gmail.com>";
   orbitz = "Malcolm Matalka <mmatalka@gmail.com>";
   orivej = "Orivej Desh <orivej@gmx.fr>";
@@ -437,12 +369,9 @@
   paholg = "Paho Lurie-Gregg <paho@paholg.com>";
   pakhfn = "Fedor Pakhomov <pakhfn@gmail.com>";
   palo = "Ingolf Wanger <palipalo9@googlemail.com>";
-  panaeon = "Vitalii Voloshyn <vitalii.voloshyn@gmail.com";
   paperdigits = "Mica Semrick <mica@silentumbrella.com>";
   pashev = "Igor Pashev <pashev.igor@gmail.com>";
-  patternspandemic = "Brad Christensen <patternspandemic@live.com>";
   pawelpacana = "Paweł Pacana <pawel.pacana@gmail.com>";
-  pbogdan = "Piotr Bogdan <ppbogdan@gmail.com>";
   periklis = "theopompos@gmail.com";
   pesterhazy = "Paulus Esterhazy <pesterhazy@gmail.com>";
   peterhoeg = "Peter Hoeg <peter@hoeg.com>";
@@ -452,14 +381,12 @@
   Phlogistique = "Noé Rubinstein <noe.rubinstein@gmail.com>";
   phreedom = "Evgeny Egorochkin <phreedom@yandex.ru>";
   phunehehe = "Hoang Xuan Phu <phunehehe@gmail.com>";
-  pierrer = "Pierre Radermecker <pierrer@pi3r.be>";
   pierron = "Nicolas B. Pierron <nixos@nbp.name>";
   piotr = "Piotr Pietraszkiewicz <ppietrasa@gmail.com>";
   pjbarnoy = "Perry Barnoy <pjbarnoy@gmail.com>";
   pjones = "Peter Jones <pjones@devalot.com>";
   pkmx = "Chih-Mao Chen <pkmx.tw@gmail.com>";
   plcplc = "Philip Lykke Carlsen <plcplc@gmail.com>";
-  plumps = "Maksim Bronsky <maks.bronsky@web.de";
   pmahoney = "Patrick Mahoney <pat@polycrystal.org>";
   pmiddend = "Philipp Middendorf <pmidden@secure.mailbox.org>";
   polyrod = "Maurizio Di Pietro <dc1mdp@gmail.com>";
@@ -489,54 +416,43 @@
   relrod = "Ricky Elrod <ricky@elrod.me>";
   renzo = "Renzo Carbonara <renzocarbonara@gmail.com>";
   retrry = "Tadas Barzdžius <retrry@gmail.com>";
-  rht = "rht <rhtbot@protonmail.com>";
   rick68 = "Wei-Ming Yang <rick68@gmail.com>";
   rickynils = "Rickard Nilsson <rickynils@gmail.com>";
-  ris = "Robert Scott <code@humanleg.org.uk>";
   rlupton20 = "Richard Lupton <richard.lupton@gmail.com>";
   rnhmjoj = "Michele Guerini Rocco <micheleguerinirocco@me.com>";
   rob = "Rob Vermaas <rob.vermaas@gmail.com>";
   robberer = "Longrin Wischnewski <robberer@freakmail.de>";
   robbinch = "Robbin C. <robbinch33@gmail.com>";
-  roberth = "Robert Hensing <nixpkgs@roberthensing.nl>";
   robgssp = "Rob Glossop <robgssp@gmail.com>";
   roblabla = "Robin Lambertz <robinlambertz+dev@gmail.com>";
   roconnor = "Russell O'Connor <roconnor@theorem.ca>";
   romildo = "José Romildo Malaquias <malaquias@gmail.com>";
   rongcuid = "Rongcui Dong <rongcuid@outlook.com>";
-  rszibele = "Richard Szibele <richard@szibele.com>";
+  ronny = "Ronny Pfannschmidt <nixos@ronnypfannschmidt.de>";
+  rszibele = "Richard Szibele <richard_szibele@hotmail.com>";
   rtreffer = "Rene Treffer <treffer+nixos@measite.de>";
   rushmorem = "Rushmore Mushambi <rushmore@webenchanter.com>";
   rvl = "Rodney Lorrimar <dev+nix@rodney.id.au>";
   rvlander = "Gaëtan André <rvlander@gaetanandre.eu>";
-  rvolosatovs = "Roman Volosatovs <rvolosatovs@riseup.net";
   ryanartecona = "Ryan Artecona <ryanartecona@gmail.com>";
   ryansydnor = "Ryan Sydnor <ryan.t.sydnor@gmail.com>";
   ryantm = "Ryan Mulligan <ryan@ryantm.com>";
-  rybern = "Ryan Bernstein <ryan.bernstein@columbia.edu>";
   rycee = "Robert Helgesson <robert@rycee.net>";
   ryneeverett = "Ryne Everett <ryneeverett@gmail.com>";
-  rzetterberg = "Richard Zetterberg <richard.zetterberg@gmail.com>";
   s1lvester = "Markus Silvester <s1lvester@bockhacker.me>";
   samuelrivas = "Samuel Rivas <samuelrivas@gmail.com>";
   sander = "Sander van der Burg <s.vanderburg@tudelft.nl>";
-  sargon = "Daniel Ehlers <danielehlers@mindeye.net>";
-  sauyon = "Sauyon Lee <s@uyon.co>";
   schmitthenner = "Fabian Schmitthenner <development@schmitthenner.eu>";
   schneefux = "schneefux <schneefux+nixos_pkg@schneefux.xyz>";
   schristo = "Scott Christopher <schristopher@konputa.com>";
   scolobb = "Sergiu Ivanov <sivanov@colimite.fr>";
-  sdll = "Sasha Illarionov <sasha.delly@gmail.com>";
   sepi = "Raffael Mancini <raffael@mancini.lu>";
   seppeljordan = "Sebastian Jordan <sebastian.jordan.mail@googlemail.com>";
-  shanemikel = "Shane Pearlman <shanemikel1@gmail.com>";
-  shawndellysse = "Shawn Dellysse <sdellysse@gmail.com>";
   sheenobu = "Sheena Artrip <sheena.artrip@gmail.com>";
   sheganinans = "Aistis Raulinaitis <sheganinans@gmail.com>";
   shell = "Shell Turner <cam.turn@gmail.com>";
   shlevy = "Shea Levy <shea@shealevy.com>";
   siddharthist = "Langston Barrett <langston.barrett@gmail.com>";
-  sigma = "Yann Hodique <yann.hodique@gmail.com>";
   simonvandel = "Simon Vandel Sillesen <simon.vandel@gmail.com>";
   sjagoe = "Simon Jagoe <simon@simonjagoe.com>";
   sjmackenzie = "Stewart Mackenzie <setori88@gmail.com>";
@@ -545,9 +461,7 @@
   skrzyp = "Jakub Skrzypnik <jot.skrzyp@gmail.com>";
   sleexyz = "Sean Lee <freshdried@gmail.com>";
   smironov = "Sergey Mironov <grrwlf@gmail.com>";
-  snyh = "Xia Bin <snyh@snyh.org>";
   solson = "Scott Olson <scott@solson.me>";
-  sorpaas = "Wei Tang <hi@that.world>";
   spacefrogg = "Michael Raitza <spacefrogg-nixos@meterriblecrew.net>";
   spencerjanssen = "Spencer Janssen <spencerjanssen@gmail.com>";
   spinus = "Tomasz Czyż <tomasz.czyz@gmail.com>";
@@ -559,9 +473,7 @@
   sternenseemann = "Lukas Epple <post@lukasepple.de>";
   stesie = "Stefan Siegl <stesie@brokenpipe.de>";
   steveej = "Stefan Junker <mail@stefanjunker.de>";
-  SuprDewd = "Bjarki Ágúst Guðmundsson <suprdewd@gmail.com>";
   swarren83 = "Shawn Warren <shawn.w.warren@gmail.com>";
-  swflint = "Samuel W. Flint <swflint@flintfam.org>";
   swistak35 = "Rafał Łasocha <me@swistak35.com>";
   szczyp = "Szczyp <qb@szczyp.com>";
   sztupi = "Attila Sztupak <attila.sztupak@gmail.com>";
@@ -569,8 +481,6 @@
   tailhook = "Paul Colomiets <paul@colomiets.name>";
   takikawa = "Asumu Takikawa <asumu@igalia.com>";
   taktoa = "Remy Goldschmidt <taktoa@gmail.com>";
-  taku0 = "Takuo Yonezawa <mxxouy6x3m_github@tatapa.org>";
-  tari = "Peter Marheine <peter@taricorp.net>";
   tavyc = "Octavian Cerna <octavian.cerna@gmail.com>";
   teh = "Tom Hunger <tehunger@gmail.com>";
   telotortium = "Robert Irelan <rirelan@gmail.com>";
@@ -581,28 +491,21 @@
   thoughtpolice = "Austin Seipp <aseipp@pobox.com>";
   timbertson = "Tim Cuthbertson <tim@gfxmonk.net>";
   titanous = "Jonathan Rudenberg <jonathan@titanous.com>";
-  tnias = "Philipp Bartsch <phil@grmr.de>";
   tohl = "Tomas Hlavaty <tom@logand.com>";
   tokudan = "Daniel Frank <git@danielfrank.net>";
   tomberek = "Thomas Bereknyei <tomberek@gmail.com>";
-  tomsmeets = "Tom Smeets <tom@tsmeets.nl>";
   travisbhartwell = "Travis B. Hartwell <nafai@travishartwell.net>";
-  trevorj = "Trevor Joynson <nix@trevor.joynson.io>";
   trino = "Hubert Mühlhans <muehlhans.hubert@ekodia.de>";
   tstrobel = "Thomas Strobel <4ZKTUB6TEP74PYJOPWIR013S2AV29YUBW5F9ZH2F4D5UMJUJ6S@hash.domains>";
   ttuegel = "Thomas Tuegel <ttuegel@mailbox.org>";
   tv = "Tomislav Viljetić <tv@shackspace.de>";
   tvestelind = "Tomas Vestelind <tomas.vestelind@fripost.org>";
   tvorog = "Marsel Zaripov <marszaripov@gmail.com>";
-  tweber = "Thorsten Weber <tw+nixpkgs@360vier.de>";
   twey = "James ‘Twey’ Kay <twey@twey.co.uk>";
   uralbash = "Svintsov Dmitry <root@uralbash.ru>";
-  utdemir = "Utku Demir <me@utdemir.com>";
-  #urkud = "Yury G. Kudryashov <urkud+nix@ya.ru>"; inactive since 2012
+  urkud = "Yury G. Kudryashov <urkud+nix@ya.ru>";
   uwap = "uwap <me@uwap.name>";
-  vaibhavsagar = "Vaibhav Sagar <vaibhavsagar@gmail.com>";
   vandenoever = "Jos van den Oever <jos@vandenoever.info>";
-  vanschelven = "Klaas van Schelven <klaas@vanschelven.com>";
   vanzef = "Ivan Solyankin <vanzef@gmail.com>";
   vbgl = "Vincent Laporte <Vincent.Laporte@gmail.com>";
   vbmithr = "Vincent Bernardoff <vb@luminar.eu.org>";
@@ -610,21 +513,16 @@
   vdemeester = "Vincent Demeester <vincent@sbr.pm>";
   veprbl = "Dmitry Kalinkin <veprbl@gmail.com>";
   vifino = "Adrian Pistol <vifino@tty.sh>";
-  vinymeuh = "VinyMeuh <vinymeuh@gmail.com>";
   viric = "Lluís Batlle i Rossell <viric@viric.name>";
   vizanto = "Danny Wilson <danny@prime.vc>";
   vklquevs = "vklquevs <vklquevs@gmail.com>";
   vlstill = "Vladimír Štill <xstill@fi.muni.cz>";
   vmandela = "Venkateswara Rao Mandela <venkat.mandela@gmail.com>";
-  vmchale = "Vanessa McHale <tmchale@wisc.edu>";
-  valeriangalliat = "Valérian Galliat <val@codejam.info>";
   volhovm = "Mikhail Volkhov <volhovm.cs@gmail.com>";
   volth = "Jaroslavas Pocepko <jaroslavas@volth.com>";
   vozz = "Oliver Hunt <oliver.huntuk@gmail.com>";
   vrthra = "Rahul Gopinath <rahul@gopinath.org>";
-  vyp = "vyp <elisp.vim@gmail.com>";
   wedens = "wedens <kirill.wedens@gmail.com>";
-  willibutz = "Willi Butz <willibutz@posteo.de>";
   willtim = "Tim Philip Williams <tim.williams.public@gmail.com>";
   winden = "Antonio Vargas Gonzalez <windenntw@gmail.com>";
   wizeman = "Ricardo M. Correia <rcorreia@wizy.org>";
@@ -634,24 +532,17 @@
   womfoo = "Kranium Gikos Mendoza <kranium@gikos.net>";
   wscott = "Wayne Scott <wsc9tt@gmail.com>";
   wyvie = "Elijah Rum <elijahrum@gmail.com>";
-  xnwdd = "Guillermo NWDD <nwdd+nixos@no.team>";
-  xvapx = "Marti Serra <marti.serra.coscollano@gmail.com>";
   xwvvvvwx = "David Terry <davidterry@posteo.de>";
   yarr = "Dmitry V. <savraz@gmail.com>";
   yochai = "Yochai <yochai@titat.info>";
   yorickvp = "Yorick van Pelt <yorickvanpelt@gmail.com>";
-  yuriaisaka = "Yuri Aisaka <yuri.aisaka+nix@gmail.com>";
   yurrriq = "Eric Bailey <eric@ericb.me>";
   z77z = "Marco Maggesi <maggesi@math.unifi.it>";
   zagy = "Christian Zagrodnick <cz@flyingcircus.io>";
-  zalakain = "Unai Zalakain <contact@unaizalakain.info>";
-  zarelit = "David Costa <david@zarel.net>";
   zauberpony = "Elmar Athmer <elmar@athmer.org>";
   zef = "Zef Hemel <zef@zef.me>";
   zimbatm = "zimbatm <zimbatm@zimbatm.com>";
-  Zimmi48 = "Théo Zimmermann <theo.zimmermann@univ-paris-diderot.fr>";
   zohl = "Al Zohali <zohl@fmap.me>";
   zoomulator = "Kim Simmons <zoomulator@gmail.com>";
   zraexy = "David Mell <zraexy@gmail.com>";
-  zx2c4 = "Jason A. Donenfeld <Jason@zx2c4.com>";
 }

lib/meta.nix

@@ -17,11 +17,6 @@ rec {
     drv // { meta = (drv.meta or {}) // newAttrs; };
 
 
-  /* Disable Hydra builds of given derivation.
-  */
-  dontDistribute = drv: addMetaAttrs { hydraPlatforms = []; } drv;
-
-
   /* Change the symbolic name of a package for presentation purposes
      (i.e., so that nix-env users can tell them apart).
   */
@@ -50,7 +45,7 @@ rec {
   /* Decrease the nix-env priority of the package, i.e., other
      versions/variants of the package will be preferred.
   */
-  lowPrio = drv: addMetaAttrs { priority = 10; } drv;
+  lowPrio = drv: addMetaAttrs { priority = "10"; } drv;
 
 
   /* Apply lowPrio to an attrset with derivations
@@ -61,7 +56,7 @@ rec {
   /* Increase the nix-env priority of the package, i.e., this
      version/variant of the package will be preferred.
   */
-  hiPrio = drv: addMetaAttrs { priority = -10; } drv;
+  hiPrio = drv: addMetaAttrs { priority = "-10"; } drv;
 
 
   /* Apply hiPrio to an attrset with derivations

lib/minver.nix

@@ -1,2 +1,2 @@
 # Expose the minimum required version for evaluating Nixpkgs
-"1.11"
+"1.10"

lib/modules.nix

@@ -20,8 +20,7 @@ rec {
                 , prefix ? []
                 , # This should only be used for special arguments that need to be evaluated
                   # when resolving module structure (like in imports). For everything else,
-                  # there's _module.args. If specialArgs.modulesPath is defined it will be
-                  # used as the base path for disabledModules.
+                  # there's _module.args.
                   specialArgs ? {}
                 , # This would be remove in the future, Prefer _module.args option instead.
                   args ? {}
@@ -59,7 +58,10 @@ rec {
 
       closed = closeModules (modules ++ [ internalModule ]) ({ inherit config options; lib = import ./.; } // specialArgs);
 
-      options = mergeModules prefix (reverseList (filterModules (specialArgs.modulesPath or "") closed));
+      # Note: the list of modules is reversed to maintain backward
+      # compatibility with the old module system.  Not sure if this is
+      # the most sensible policy.
+      options = mergeModules prefix (reverseList closed);
 
       # Traverse options and extract the option values into the final
       # config set.  At the same time, check whether all option
@@ -85,20 +87,10 @@ rec {
       result = { inherit options config; };
     in result;
 
-
- # Filter disabled modules. Modules can be disabled allowing
- # their implementation to be replaced.
- filterModules = modulesPath: modules:
-   let
-     moduleKey = m: if isString m then toString modulesPath + "/" + m else toString m;
-     disabledKeys = map moduleKey (concatMap (m: m.disabledModules) modules);
-   in
-     filter (m: !(elem m.key disabledKeys)) modules;
-
   /* Close a set of modules under the ‘imports’ relation. */
   closeModules = modules: args:
     let
-      toClosureList = file: parentKey: imap1 (n: x:
+      toClosureList = file: parentKey: imap (n: x:
         if isAttrs x || isFunction x then
           let key = "${parentKey}:anon-${toString n}"; in
           unifyModuleSyntax file key (unpackSubmodule (applyIfFunction key) x args)
@@ -114,18 +106,17 @@ rec {
   /* Massage a module into canonical form, that is, a set consisting
      of ‘options’, ‘config’ and ‘imports’ attributes. */
   unifyModuleSyntax = file: key: m:
-    let metaSet = if m ? meta
+    let metaSet = if m ? meta 
       then { meta = m.meta; }
       else {};
     in
     if m ? config || m ? options then
-      let badAttrs = removeAttrs m ["_file" "key" "disabledModules" "imports" "options" "config" "meta"]; in
+      let badAttrs = removeAttrs m ["imports" "options" "config" "key" "_file" "meta"]; in
       if badAttrs != {} then
         throw "Module `${key}' has an unsupported attribute `${head (attrNames badAttrs)}'. This is caused by assignments to the top-level attributes `config' or `options'."
       else
         { file = m._file or file;
           key = toString m.key or key;
-          disabledModules = m.disabledModules or [];
           imports = m.imports or [];
           options = m.options or {};
           config = mkMerge [ (m.config or {}) metaSet ];
@@ -133,10 +124,9 @@ rec {
     else
       { file = m._file or file;
         key = toString m.key or key;
-        disabledModules = m.disabledModules or [];
         imports = m.require or [] ++ m.imports or [];
         options = {};
-        config = mkMerge [ (removeAttrs m ["_file" "key" "disabledModules" "require" "imports"]) metaSet ];
+        config = mkMerge [ (removeAttrs m ["key" "_file" "require" "imports"]) metaSet ];
       };
 
   applyIfFunction = key: f: args@{ config, options, lib, ... }: if isFunction f then
@@ -423,7 +413,7 @@ rec {
     in concatMap (def: if getPrio def == highestPrio then [(strip def)] else []) defs;
 
   /* Sort a list of properties.  The sort priority of a property is
-     1000 by default, but can be overridden by wrapping the property
+     1000 by default, but can be overriden by wrapping the property
      using mkOrder. */
   sortProperties = defs:
     let
@@ -595,7 +585,7 @@ rec {
        functionality
 
      This show a warning if any a.b.c or d.e.f is set, and set the value of
-     x.y.z to the result of the merge function
+     x.y.z to the result of the merge function 
   */
   mkMergedOptionModule = from: to: mergeFn:
     { config, options, ... }:
@@ -611,12 +601,12 @@ rec {
           let val = getAttrFromPath f config;
               opt = getAttrFromPath f options;
           in
-          optionalString
+          optionalString 
             (val != "_mkMergedOptionModule")
             "The option `${showOption f}' defined in ${showFiles opt.files} has been changed to `${showOption to}' that has a different type. Please read `${showOption to}' documentation and update your configuration accordingly."
         ) from);
       } // setAttrByPath to (mkMerge
-             (optional
+             (optional 
                (any (f: (getAttrFromPath f config) != "_mkMergedOptionModule") from)
                (mergeFn config)));
     };

lib/platforms.nix

@@ -0,0 +1,24 @@
+let lists = import ./lists.nix; in
+
+rec {
+  all = linux ++ darwin ++ cygwin ++ freebsd ++ openbsd ++ netbsd ++ illumos;
+  allBut = platforms: lists.filter (x: !(builtins.elem x platforms)) all;
+  none = [];
+
+  arm = ["armv5tel-linux" "armv6l-linux" "armv7l-linux" ];
+  i686 = ["i686-linux" "i686-freebsd" "i686-netbsd" "i686-cygwin"];
+  mips = [ "mips64el-linux" ];
+  x86_64 = ["x86_64-linux" "x86_64-darwin" "x86_64-freebsd" "x86_64-openbsd" "x86_64-netbsd" "x86_64-cygwin"];
+
+  cygwin = ["i686-cygwin" "x86_64-cygwin"];
+  darwin = ["x86_64-darwin"];
+  freebsd = ["i686-freebsd" "x86_64-freebsd"];
+  gnu = linux; /* ++ hurd ++ kfreebsd ++ ... */
+  illumos = ["x86_64-solaris"];
+  linux = ["i686-linux" "x86_64-linux" "armv5tel-linux" "armv6l-linux" "armv7l-linux" "aarch64-linux" "mips64el-linux"];
+  netbsd = ["i686-netbsd" "x86_64-netbsd"];
+  openbsd = ["i686-openbsd" "x86_64-openbsd"];
+  unix = linux ++ darwin ++ freebsd ++ openbsd ++ netbsd ++ illumos;
+
+  mesaPlatforms = ["i686-linux" "x86_64-linux" "x86_64-darwin" "armv5tel-linux" "armv6l-linux" "armv7l-linux" "aarch64-linux"];
+}

lib/sources.nix

@@ -17,8 +17,6 @@ rec {
     (type == "directory" && (baseName == ".git" || baseName == ".svn" || baseName == "CVS" || baseName == ".hg")) ||
     # Filter out backup files.
     lib.hasSuffix "~" baseName ||
-    builtins.match "^.*\.sw[a-z]$" baseName != null ||
-
     # Filter out generates files.
     lib.hasSuffix ".o" baseName ||
     lib.hasSuffix ".so" baseName ||

lib/strings.nix

@@ -33,7 +33,7 @@ rec {
        concatImapStrings (pos: x: "${toString pos}-${x}") ["foo" "bar"]
        => "1-foo2-bar"
   */
-  concatImapStrings = f: list: concatStrings (lib.imap1 f list);
+  concatImapStrings = f: list: concatStrings (lib.imap f list);
 
   /* Place an element between each element of a list
 
@@ -70,7 +70,7 @@ rec {
        concatImapStringsSep "-" (pos: x: toString (x / pos)) [ 6 6 6 ]
        => "6-3-2"
   */
-  concatImapStringsSep = sep: f: list: concatStringsSep sep (lib.imap1 f list);
+  concatImapStringsSep = sep: f: list: concatStringsSep sep (lib.imap f list);
 
   /* Construct a Unix-style search path consisting of each `subDir"
      directory of the given list of packages.
@@ -126,8 +126,8 @@ rec {
   */
   makePerlPath = makeSearchPathOutput "lib" "lib/perl5/site_perl";
 
-  /* Depending on the boolean `cond', return either the given string
-     or the empty string. Useful to concatenate against a bigger string.
+  /* Dependening on the boolean `cond', return either the given string
+     or the empty string. Useful to contatenate against a bigger string.
 
      Example:
        optionalString true "some-string"
@@ -291,7 +291,7 @@ rec {
 
       recurse = index: startAt:
         let cutUntil = i: [(substring startAt (i - startAt) s)]; in
-        if index <= lastSearch then
+        if index < lastSearch then
           if startWithSep index then
             let restartAt = index + sepLen; in
             cutUntil index ++ recurse restartAt restartAt
@@ -438,13 +438,8 @@ rec {
        => true
        isStorePath pkgs.python
        => true
-       isStorePath [] || isStorePath 42 || isStorePath {} || …
-       => false
   */
-  isStorePath = x:
-       builtins.isString x
-    && builtins.substring 0 1 (toString x) == "/"
-    && dirOf (builtins.toPath x) == builtins.storeDir;
+  isStorePath = x: builtins.substring 0 1 (toString x) == "/" && dirOf (builtins.toPath x) == builtins.storeDir;
 
   /* Convert string to int
      Obviously, it is a bit hacky to use fromJSON that way.
@@ -481,8 +476,10 @@ rec {
   readPathsFromFile = rootPath: file:
     let
       root = toString rootPath;
-      lines = lib.splitString "\n" (builtins.readFile file);
-      removeComments = lib.filter (line: line != "" && !(lib.hasPrefix "#" line));
+      lines =
+        builtins.map (lib.removeSuffix "\n")
+        (lib.splitString "\n" (builtins.readFile file));
+      removeComments = lib.filter (line: !(lib.hasPrefix "#" line));
       relativePaths = removeComments lines;
       absolutePaths = builtins.map (path: builtins.toPath (root + "/" + path)) relativePaths;
     in

lib/systems.nix

@@ -0,0 +1,126 @@
+# Define the list of system with their properties.  Only systems tested for
+# Nixpkgs are listed below
+
+with import ./lists.nix;
+with import ./types.nix;
+with import ./attrsets.nix;
+
+let
+  lib = import ./default.nix;
+  setTypes = type:
+    mapAttrs (name: value:
+      setType type ({inherit name;} // value)
+    );
+in
+
+rec {
+
+  isSignificantByte = isType "significant-byte";
+  significantBytes = setTypes "significant-byte" {
+    bigEndian = {};
+    littleEndian = {};
+  };
+
+
+  isCpuType = x: isType "cpu-type" x
+    && elem x.bits [8 16 32 64 128]
+    && (8 < x.bits -> isSignificantByte x.significantByte);
+
+  cpuTypes = with significantBytes;
+    setTypes "cpu-type" {
+      arm =      { bits = 32; significantByte = littleEndian; };
+      armv5tel = { bits = 32; significantByte = littleEndian; };
+      armv7l   = { bits = 32; significantByte = littleEndian; };
+      i686 =     { bits = 32; significantByte = littleEndian; };
+      powerpc =  { bits = 32; significantByte = bigEndian; };
+      x86_64 =   { bits = 64; significantByte = littleEndian; };
+    };
+
+
+  isExecFormat = isType "exec-format";
+  execFormats = setTypes "exec-format" {
+    aout = {}; # a.out
+    elf = {};
+    macho = {};
+    pe = {};
+    unknow = {};
+  };
+
+
+  isKernel = isType "kernel";
+  kernels = with execFormats;
+    setTypes "kernel" {
+      cygwin =  { execFormat = pe; };
+      darwin =  { execFormat = macho; };
+      freebsd = { execFormat = elf; };
+      linux =   { execFormat = elf; };
+      netbsd =  { execFormat = elf; };
+      none =    { execFormat = unknow; };
+      openbsd = { execFormat = elf; };
+      win32 =   { execFormat = pe; };
+    };
+
+
+  isArchitecture = isType "architecture";
+  architectures = setTypes "architecture" {
+    apple = {};
+    pc = {};
+    unknow = {};
+  };
+
+
+  isSystem = x: isType "system" x
+    && isCpuType x.cpu
+    && isArchitecture x.arch
+    && isKernel x.kernel;
+
+  mkSystem = {
+    cpu ? cpuTypes.i686,
+    arch ? architectures.pc,
+    kernel ? kernels.linux,
+    name ? "${cpu.name}-${arch.name}-${kernel.name}"
+  }: setType "system" {
+    inherit name cpu arch kernel;
+  };
+
+
+  is64Bit = matchAttrs { cpu = { bits = 64; }; };
+  isDarwin = matchAttrs { kernel = kernels.darwin; };
+  isi686 = matchAttrs { cpu = cpuTypes.i686; };
+  isLinux = matchAttrs { kernel = kernels.linux; };
+
+
+  # This should revert the job done by config.guess from the gcc compiler.
+  mkSystemFromString = s: let
+    l = lib.splitString "-" s;
+
+    getCpu = name:
+      attrByPath [name] (throw "Unknow cpuType `${name}'.")
+        cpuTypes;
+    getArch = name:
+      attrByPath [name] (throw "Unknow architecture `${name}'.")
+        architectures;
+    getKernel = name:
+      attrByPath [name] (throw "Unknow kernel `${name}'.")
+        kernels;
+
+    system =
+      if builtins.length l == 2 then
+        mkSystem rec {
+          name = s;
+          cpu = getCpu (head l);
+          arch =
+            if isDarwin system
+            then architectures.apple
+            else architectures.pc;
+          kernel = getKernel (head (tail l));
+        }
+      else
+        mkSystem {
+          name = s;
+          cpu = getCpu (head l);
+          arch = getArch (head (tail l));
+          kernel = getKernel (head (tail (tail l)));
+        };
+  in assert isSystem system; system;
+}

lib/systems/default.nix

@@ -1,34 +0,0 @@
-let inherit (import ../attrsets.nix) mapAttrs; in
-
-rec {
-  doubles = import ./doubles.nix;
-  parse = import ./parse.nix;
-  inspect = import ./inspect.nix;
-  platforms = import ./platforms.nix;
-  examples = import ./examples.nix;
-
-  # Elaborate a `localSystem` or `crossSystem` so that it contains everything
-  # necessary.
-  #
-  # `parsed` is inferred from args, both because there are two options with one
-  # clearly prefered, and to prevent cycles. A simpler fixed point where the RHS
-  # always just used `final.*` would fail on both counts.
-  elaborate = args: let
-    final = {
-      # Prefer to parse `config` as it is strictly more informative.
-      parsed = parse.mkSystemFromString (if args ? config then args.config else args.system);
-      # Either of these can be losslessly-extracted from `parsed` iff parsing succeeds.
-      system = parse.doubleFromSystem final.parsed;
-      config = parse.tripleFromSystem final.parsed;
-      # Just a guess, based on `system`
-      platform = platforms.selectBySystem final.system;
-      libc =
-        /**/ if final.isDarwin then "libSystem"
-        else if final.isMinGW  then "msvcrt"
-        else if final.isLinux  then "glibc"
-        # TODO(@Ericson2314) think more about other operating systems
-        else                        "native/impure";
-    } // mapAttrs (n: v: v final.parsed) inspect.predicates
-      // args;
-  in final;
-}

lib/systems/doubles.nix

@@ -1,46 +0,0 @@
-let
-  lists = import ../lists.nix;
-  parse = import ./parse.nix;
-  inherit (import ./inspect.nix) predicates;
-  inherit (import ../attrsets.nix) matchAttrs;
-
-  all = [
-    "aarch64-linux"
-    "armv5tel-linux" "armv6l-linux" "armv7l-linux"
-
-    "mips64el-linux"
-
-    "i686-cygwin" "i686-freebsd" "i686-linux" "i686-netbsd" "i686-openbsd"
-
-    "x86_64-cygwin" "x86_64-darwin" "x86_64-freebsd" "x86_64-linux"
-    "x86_64-netbsd" "x86_64-openbsd" "x86_64-solaris"
-  ];
-
-  allParsed = map parse.mkSystemFromString all;
-
-  filterDoubles = f: map parse.doubleFromSystem (lists.filter f allParsed);
-
-in rec {
-  inherit all;
-
-  allBut = platforms: lists.filter (x: !(builtins.elem x platforms)) all;
-  none = [];
-
-  arm     = filterDoubles predicates.isArm;
-  i686    = filterDoubles predicates.isi686;
-  mips    = filterDoubles predicates.isMips;
-  x86_64  = filterDoubles predicates.isx86_64;
-
-  cygwin  = filterDoubles predicates.isCygwin;
-  darwin  = filterDoubles predicates.isDarwin;
-  freebsd = filterDoubles predicates.isFreeBSD;
-  # Should be better, but MinGW is unclear, and HURD is bit-rotted.
-  gnu     = filterDoubles (matchAttrs { kernel = parse.kernels.linux;  abi = parse.abis.gnu; });
-  illumos = filterDoubles predicates.isSunOS;
-  linux   = filterDoubles predicates.isLinux;
-  netbsd  = filterDoubles predicates.isNetBSD;
-  openbsd = filterDoubles predicates.isOpenBSD;
-  unix    = filterDoubles predicates.isUnix;
-
-  mesaPlatforms = ["i686-linux" "x86_64-linux" "x86_64-darwin" "armv5tel-linux" "armv6l-linux" "armv7l-linux" "aarch64-linux"];
-}

lib/systems/examples.nix

@@ -1,130 +0,0 @@
-# These can be passed to nixpkgs as either the `localSystem` or
-# `crossSystem`. They are put here for user convenience, but also used by cross
-# tests and linux cross stdenv building, so handle with care!
-
-let platforms = import ./platforms.nix; in
-
-rec {
-  #
-  # Linux
-  #
-
-  sheevaplug = rec {
-    config = "armv5tel-unknown-linux-gnueabi";
-    bigEndian = false;
-    arch = "armv5tel";
-    float = "soft";
-    withTLS = true;
-    libc = "glibc";
-    platform = platforms.sheevaplug;
-    openssl.system = "linux-generic32";
-    inherit (platform) gcc;
-  };
-
-  raspberryPi = rec {
-    config = "armv6l-unknown-linux-gnueabihf";
-    bigEndian = false;
-    arch = "armv6l";
-    float = "hard";
-    fpu = "vfp";
-    withTLS = true;
-    libc = "glibc";
-    platform = platforms.raspberrypi;
-    openssl.system = "linux-generic32";
-    inherit (platform) gcc;
-  };
-
-  armv7l-hf-multiplatform = rec {
-    config = "arm-unknown-linux-gnueabihf";
-    bigEndian = false;
-    arch = "armv7-a";
-    float = "hard";
-    fpu = "vfpv3-d16";
-    withTLS = true;
-    libc = "glibc";
-    platform = platforms.armv7l-hf-multiplatform;
-    openssl.system = "linux-generic32";
-    inherit (platform) gcc;
-  };
-
-  aarch64-multiplatform = rec {
-    config = "aarch64-unknown-linux-gnu";
-    bigEndian = false;
-    arch = "aarch64";
-    withTLS = true;
-    libc = "glibc";
-    platform = platforms.aarch64-multiplatform;
-    inherit (platform) gcc;
-  };
-
-  scaleway-c1 = armv7l-hf-multiplatform // rec {
-    platform = platforms.scaleway-c1;
-    inherit (platform) gcc;
-    inherit (gcc) fpu;
-  };
-
-  pogoplug4 = rec {
-    arch = "armv5tel";
-    config = "armv5tel-softfloat-linux-gnueabi";
-    float = "soft";
-
-    platform = platforms.pogoplug4;
-
-    inherit (platform) gcc;
-    libc = "glibc";
-
-    withTLS = true;
-    openssl.system = "linux-generic32";
-  };
-
-  fuloongminipc = rec {
-    config = "mips64el-unknown-linux-gnu";
-    bigEndian = false;
-    arch = "mips";
-    float = "hard";
-    withTLS = true;
-    libc = "glibc";
-    platform = platforms.fuloong2f_n32;
-    openssl.system = "linux-generic32";
-    inherit (platform) gcc;
-  };
-
-  #
-  # Darwin
-  #
-
-  iphone64 = {
-    config = "aarch64-apple-darwin14";
-    arch = "arm64";
-    libc = "libSystem";
-    platform = {};
-  };
-
-  iphone32 = {
-    config = "arm-apple-darwin10";
-    arch = "armv7-a";
-    libc = "libSystem";
-    platform = {};
-  };
-
-  #
-  # Windows
-  #
-
-  # 32 bit mingw-w64
-  mingw32 = {
-    config = "i686-pc-mingw32";
-    arch = "x86"; # Irrelevant
-    libc = "msvcrt"; # This distinguishes the mingw (non posix) toolchain
-    platform = {};
-  };
-
-  # 64 bit mingw-w64
-  mingwW64 = {
-    # That's the triplet they use in the mingw-w64 docs.
-    config = "x86_64-pc-mingw32";
-    arch = "x86_64"; # Irrelevant
-    libc = "msvcrt"; # This distinguishes the mingw (non posix) toolchain
-    platform = {};
-  };
-}

lib/systems/inspect.nix

@@ -1,41 +0,0 @@
-with import ./parse.nix;
-with import ../attrsets.nix;
-with import ../lists.nix;
-
-rec {
-  patterns = rec {
-    "32bit"      = { cpu = { bits = 32; }; };
-    "64bit"      = { cpu = { bits = 64; }; };
-    i686         = { cpu = cpuTypes.i686; };
-    x86_64       = { cpu = cpuTypes.x86_64; };
-    PowerPC      = { cpu = cpuTypes.powerpc; };
-    x86          = { cpu = { family = "x86"; }; };
-    Arm          = { cpu = { family = "arm"; }; };
-    Aarch64      = { cpu = { family = "aarch64"; }; };
-    Mips         = { cpu = { family = "mips"; }; };
-    BigEndian    = { cpu = { significantByte = significantBytes.bigEndian; }; };
-    LittleEndian = { cpu = { significantByte = significantBytes.littleEndian; }; };
-
-    BSD          = { kernel = { families = { inherit (kernelFamilies) bsd; }; }; };
-    Unix         = [ BSD Darwin Linux SunOS Hurd Cygwin ];
-
-    Darwin       = { kernel = kernels.darwin; };
-    Linux        = { kernel = kernels.linux; };
-    SunOS        = { kernel = kernels.solaris; };
-    FreeBSD      = { kernel = kernels.freebsd; };
-    Hurd         = { kernel = kernels.hurd; };
-    NetBSD       = { kernel = kernels.netbsd; };
-    OpenBSD      = { kernel = kernels.openbsd; };
-    Windows      = { kernel = kernels.windows; };
-    Cygwin       = { kernel = kernels.windows; abi = abis.cygnus; };
-    MinGW        = { kernel = kernels.windows; abi = abis.gnu; };
-  };
-
-  matchAnyAttrs = patterns:
-    if builtins.isList patterns then attrs: any (pattern: matchAttrs pattern attrs) patterns
-    else matchAttrs patterns;
-
-  predicates = mapAttrs'
-    (name: value: nameValuePair ("is" + name) (matchAnyAttrs value))
-    patterns;
-}

lib/systems/parse.nix

@@ -1,174 +0,0 @@
-# Define the list of system with their properties.
-#
-# See https://clang.llvm.org/docs/CrossCompilation.html and
-# http://llvm.org/docs/doxygen/html/Triple_8cpp_source.html especially
-# Triple::normalize. Parsing should essentially act as a more conservative
-# version of that last function.
-
-with import ../lists.nix;
-with import ../types.nix;
-with import ../attrsets.nix;
-with (import ./inspect.nix).predicates;
-
-let
-  lib = import ../default.nix;
-  setTypesAssert = type: pred:
-    mapAttrs (name: value:
-      assert pred value;
-      setType type ({ inherit name; } // value));
-  setTypes = type: setTypesAssert type (_: true);
-
-in
-
-rec {
-
-  isSignificantByte = isType "significant-byte";
-  significantBytes = setTypes "significant-byte" {
-    bigEndian = {};
-    littleEndian = {};
-  };
-
-  isCpuType = isType "cpu-type";
-  cpuTypes = with significantBytes; setTypesAssert "cpu-type"
-    (x: elem x.bits [8 16 32 64 128]
-        && (if 8 < x.bits
-            then isSignificantByte x.significantByte
-            else !(x ? significantByte)))
-  {
-    arm      = { bits = 32; significantByte = littleEndian; family = "arm"; };
-    armv5tel = { bits = 32; significantByte = littleEndian; family = "arm"; };
-    armv6l   = { bits = 32; significantByte = littleEndian; family = "arm"; };
-    armv7a   = { bits = 32; significantByte = littleEndian; family = "arm"; };
-    armv7l   = { bits = 32; significantByte = littleEndian; family = "arm"; };
-    aarch64  = { bits = 64; significantByte = littleEndian; family = "aarch64"; };
-    i686     = { bits = 32; significantByte = littleEndian; family = "x86"; };
-    x86_64   = { bits = 64; significantByte = littleEndian; family = "x86"; };
-    mips64el = { bits = 32; significantByte = littleEndian; family = "mips"; };
-    powerpc  = { bits = 32; significantByte = bigEndian;    family = "power"; };
-  };
-
-  isVendor = isType "vendor";
-  vendors = setTypes "vendor" {
-    apple = {};
-    pc = {};
-
-    unknown = {};
-  };
-
-  isExecFormat = isType "exec-format";
-  execFormats = setTypes "exec-format" {
-    aout = {}; # a.out
-    elf = {};
-    macho = {};
-    pe = {};
-
-    unknown = {};
-  };
-
-  isKernelFamily = isType "kernel-family";
-  kernelFamilies = setTypes "kernel-family" {
-    bsd = {};
-  };
-
-  isKernel = x: isType "kernel" x;
-  kernels = with execFormats; with kernelFamilies; setTypesAssert "kernel"
-    (x: isExecFormat x.execFormat && all isKernelFamily (attrValues x.families))
-  {
-    darwin  = { execFormat = macho;   families = { }; };
-    freebsd = { execFormat = elf;     families = { inherit bsd; }; };
-    hurd    = { execFormat = elf;     families = { }; };
-    linux   = { execFormat = elf;     families = { }; };
-    netbsd  = { execFormat = elf;     families = { inherit bsd; }; };
-    none    = { execFormat = unknown; families = { }; };
-    openbsd = { execFormat = elf;     families = { inherit bsd; }; };
-    solaris = { execFormat = elf;     families = { }; };
-    windows = { execFormat = pe;      families = { }; };
-  } // { # aliases
-    # TODO(@Ericson2314): Handle these Darwin version suffixes more generally.
-    darwin10 = kernels.darwin;
-    darwin14 = kernels.darwin;
-    win32 = kernels.windows;
-  };
-
-  isAbi = isType "abi";
-  abis = setTypes "abi" {
-    cygnus = {};
-    gnu = {};
-    msvc = {};
-    eabi = {};
-    androideabi = {};
-    gnueabi = {};
-    gnueabihf = {};
-
-    unknown = {};
-  };
-
-  isSystem = isType "system";
-  mkSystem = { cpu, vendor, kernel, abi }:
-    assert isCpuType cpu && isVendor vendor && isKernel kernel && isAbi abi;
-    setType "system" {
-      inherit cpu vendor kernel abi;
-    };
-
-  mkSkeletonFromList = l: {
-    "2" = # We only do 2-part hacks for things Nix already supports
-      if elemAt l 1 == "cygwin"
-        then { cpu = elemAt l 0;                      kernel = "windows";  abi = "cygnus";   }
-      else if elemAt l 1 == "gnu"
-        then { cpu = elemAt l 0;                      kernel = "hurd";     abi = "gnu";      }
-      else   { cpu = elemAt l 0;                      kernel = elemAt l 1;                   };
-    "3" = # Awkwards hacks, beware!
-      if elemAt l 1 == "apple"
-        then { cpu = elemAt l 0; vendor = "apple";    kernel = elemAt l 2;                   }
-      else if (elemAt l 1 == "linux") || (elemAt l 2 == "gnu")
-        then { cpu = elemAt l 0;                      kernel = elemAt l 1; abi = elemAt l 2; }
-      else if (elemAt l 2 == "mingw32") # autotools breaks on -gnu for window
-        then { cpu = elemAt l 0; vendor = elemAt l 1; kernel = "windows";  abi = "gnu"; }
-      else throw "Target specification with 3 components is ambiguous";
-    "4" =    { cpu = elemAt l 0; vendor = elemAt l 1; kernel = elemAt l 2; abi = elemAt l 3; };
-  }.${toString (length l)}
-    or (throw "system string has invalid number of hyphen-separated components");
-
-  # This should revert the job done by config.guess from the gcc compiler.
-  mkSystemFromSkeleton = { cpu
-                         , # Optional, but fallback too complex for here.
-                           # Inferred below instead.
-                           vendor ? assert false; null
-                         , kernel
-                         , # Also inferred below
-                           abi    ? assert false; null
-                         } @ args: let
-    getCpu    = name: cpuTypes.${name} or (throw "Unknown CPU type: ${name}");
-    getVendor = name:  vendors.${name} or (throw "Unknown vendor: ${name}");
-    getKernel = name:  kernels.${name} or (throw "Unknown kernel: ${name}");
-    getAbi    = name:     abis.${name} or (throw "Unknown ABI: ${name}");
-
-    parsed = rec {
-      cpu = getCpu args.cpu;
-      vendor =
-        /**/ if args ? vendor    then getVendor args.vendor
-        else if isDarwin  parsed then vendors.apple
-        else if isWindows parsed then vendors.pc
-        else                     vendors.unknown;
-      kernel = getKernel args.kernel;
-      abi =
-        /**/ if args ? abi       then getAbi args.abi
-        else if isLinux   parsed then abis.gnu
-        else if isWindows parsed then abis.gnu
-        else                     abis.unknown;
-    };
-
-  in mkSystem parsed;
-
-  mkSystemFromString = s: mkSystemFromSkeleton (mkSkeletonFromList (lib.splitString "-" s));
-
-  doubleFromSystem = { cpu, vendor, kernel, abi, ... }:
-    if abi == abis.cygnus
-    then "${cpu.name}-cygwin"
-    else "${cpu.name}-${kernel.name}";
-
-  tripleFromSystem = { cpu, vendor, kernel, abi, ... } @ sys: assert isSystem sys; let
-    optAbi = lib.optionalString (abi != abis.unknown) "-${abi.name}";
-  in "${cpu.name}-${vendor.name}-${kernel.name}${optAbi}";
-
-}

lib/systems/platforms.nix

@@ -1,567 +0,0 @@
-rec {
-  pcBase = {
-    name = "pc";
-    uboot = null;
-    kernelHeadersBaseConfig = "defconfig";
-    kernelBaseConfig = "defconfig";
-    # Build whatever possible as a module, if not stated in the extra config.
-    kernelAutoModules = true;
-    kernelTarget = "bzImage";
-  };
-
-  pc64 = pcBase // { kernelArch = "x86_64"; };
-
-  pc32 = pcBase // { kernelArch = "i386"; };
-
-  pc32_simplekernel = pc32 // {
-    kernelAutoModules = false;
-  };
-
-  pc64_simplekernel = pc64 // {
-    kernelAutoModules = false;
-  };
-
-  pogoplug4 = {
-    name = "pogoplug4";
-
-    gcc = {
-      arch = "armv5te";
-      float = "soft";
-    };
-
-    kernelMajor = "2.6";
-    kernelHeadersBaseConfig = "multi_v5_defconfig";
-    kernelBaseConfig = "multi_v5_defconfig";
-    kernelArch = "arm";
-    kernelAutoModules = false;
-    kernelExtraConfig =
-      ''
-        # Ubi for the mtd
-        MTD_UBI y
-        UBIFS_FS y
-        UBIFS_FS_XATTR y
-        UBIFS_FS_ADVANCED_COMPR y
-        UBIFS_FS_LZO y
-        UBIFS_FS_ZLIB y
-        UBIFS_FS_DEBUG n
-      '';
-    kernelMakeFlags = [ "LOADADDR=0x8000" ];
-    kernelTarget = "uImage";
-    # TODO reenable once manual-config's config actually builds a .dtb and this is checked to be working
-    #kernelDTB = true;
-
-    # XXX can be anything non-null, pkgs actually only cares if it is set or not
-    uboot = "pogoplug4";
-  };
-
-  sheevaplug = {
-    name = "sheevaplug";
-    kernelMajor = "2.6";
-    kernelHeadersBaseConfig = "multi_v5_defconfig";
-    kernelBaseConfig = "multi_v5_defconfig";
-    kernelArch = "arm";
-    kernelAutoModules = false;
-    kernelExtraConfig = ''
-      BLK_DEV_RAM y
-      BLK_DEV_INITRD y
-      BLK_DEV_CRYPTOLOOP m
-      BLK_DEV_DM m
-      DM_CRYPT m
-      MD y
-      REISERFS_FS m
-      BTRFS_FS m
-      XFS_FS m
-      JFS_FS m
-      EXT4_FS m
-      USB_STORAGE_CYPRESS_ATACB m
-
-      # mv cesa requires this sw fallback, for mv-sha1
-      CRYPTO_SHA1 y
-      # Fast crypto
-      CRYPTO_TWOFISH y
-      CRYPTO_TWOFISH_COMMON y
-      CRYPTO_BLOWFISH y
-      CRYPTO_BLOWFISH_COMMON y
-
-      IP_PNP y
-      IP_PNP_DHCP y
-      NFS_FS y
-      ROOT_NFS y
-      TUN m
-      NFS_V4 y
-      NFS_V4_1 y
-      NFS_FSCACHE y
-      NFSD m
-      NFSD_V2_ACL y
-      NFSD_V3 y
-      NFSD_V3_ACL y
-      NFSD_V4 y
-      NETFILTER y
-      IP_NF_IPTABLES y
-      IP_NF_FILTER y
-      IP_NF_MATCH_ADDRTYPE y
-      IP_NF_TARGET_LOG y
-      IP_NF_MANGLE y
-      IPV6 m
-      VLAN_8021Q m
-
-      CIFS y
-      CIFS_XATTR y
-      CIFS_POSIX y
-      CIFS_FSCACHE y
-      CIFS_ACL y
-
-      WATCHDOG y
-      WATCHDOG_CORE y
-      ORION_WATCHDOG m
-
-      ZRAM m
-      NETCONSOLE m
-
-      # Disable OABI to have seccomp_filter (required for systemd)
-      # https://github.com/raspberrypi/firmware/issues/651
-      OABI_COMPAT n
-
-      # Fail to build
-      DRM n
-      SCSI_ADVANSYS n
-      USB_ISP1362_HCD n
-      SND_SOC n
-      SND_ALI5451 n
-      FB_SAVAGE n
-      SCSI_NSP32 n
-      ATA_SFF n
-      SUNGEM n
-      IRDA n
-      ATM_HE n
-      SCSI_ACARD n
-      BLK_DEV_CMD640_ENHANCED n
-
-      FUSE_FS m
-
-      # systemd uses cgroups
-      CGROUPS y
-
-      # Latencytop
-      LATENCYTOP y
-
-      # Ubi for the mtd
-      MTD_UBI y
-      UBIFS_FS y
-      UBIFS_FS_XATTR y
-      UBIFS_FS_ADVANCED_COMPR y
-      UBIFS_FS_LZO y
-      UBIFS_FS_ZLIB y
-      UBIFS_FS_DEBUG n
-
-      # Kdb, for kernel troubles
-      KGDB y
-      KGDB_SERIAL_CONSOLE y
-      KGDB_KDB y
-    '';
-    kernelMakeFlags = [ "LOADADDR=0x0200000" ];
-    kernelTarget = "uImage";
-    uboot = "sheevaplug";
-    # Only for uboot = uboot :
-    ubootConfig = "sheevaplug_config";
-    kernelDTB = true; # Beyond 3.10
-    gcc = {
-      arch = "armv5te";
-      float = "soft";
-    };
-  };
-
-  raspberrypi = {
-    name = "raspberrypi";
-    kernelMajor = "2.6";
-    kernelHeadersBaseConfig = "bcm2835_defconfig";
-    kernelBaseConfig = "bcmrpi_defconfig";
-    kernelDTB = true;
-    kernelArch = "arm";
-    kernelAutoModules = false;
-    kernelExtraConfig = ''
-      BLK_DEV_RAM y
-      BLK_DEV_INITRD y
-      BLK_DEV_CRYPTOLOOP m
-      BLK_DEV_DM m
-      DM_CRYPT m
-      MD y
-      REISERFS_FS m
-      BTRFS_FS y
-      XFS_FS m
-      JFS_FS y
-      EXT4_FS y
-
-      IP_PNP y
-      IP_PNP_DHCP y
-      NFS_FS y
-      ROOT_NFS y
-      TUN m
-      NFS_V4 y
-      NFS_V4_1 y
-      NFS_FSCACHE y
-      NFSD m
-      NFSD_V2_ACL y
-      NFSD_V3 y
-      NFSD_V3_ACL y
-      NFSD_V4 y
-      NETFILTER y
-      IP_NF_IPTABLES y
-      IP_NF_FILTER y
-      IP_NF_MATCH_ADDRTYPE y
-      IP_NF_TARGET_LOG y
-      IP_NF_MANGLE y
-      IPV6 m
-      VLAN_8021Q m
-
-      CIFS y
-      CIFS_XATTR y
-      CIFS_POSIX y
-      CIFS_FSCACHE y
-      CIFS_ACL y
-
-      ZRAM m
-
-      # Disable OABI to have seccomp_filter (required for systemd)
-      # https://github.com/raspberrypi/firmware/issues/651
-      OABI_COMPAT n
-
-      # Fail to build
-      DRM n
-      SCSI_ADVANSYS n
-      USB_ISP1362_HCD n
-      SND_SOC n
-      SND_ALI5451 n
-      FB_SAVAGE n
-      SCSI_NSP32 n
-      ATA_SFF n
-      SUNGEM n
-      IRDA n
-      ATM_HE n
-      SCSI_ACARD n
-      BLK_DEV_CMD640_ENHANCED n
-
-      FUSE_FS m
-
-      # nixos mounts some cgroup
-      CGROUPS y
-
-      # Latencytop
-      LATENCYTOP y
-    '';
-    kernelTarget = "zImage";
-    uboot = null;
-    gcc = {
-      arch = "armv6";
-      fpu = "vfp";
-      float = "hard";
-      # TODO(@Ericson2314) what is this and is it a good idea? It was
-      # used in some cross compilation examples but not others.
-      #
-      # abi = "aapcs-linux";
-    };
-  };
-
-  raspberrypi2 = armv7l-hf-multiplatform // {
-    name = "raspberrypi2";
-    kernelBaseConfig = "bcm2709_defconfig";
-    kernelDTB = true;
-    kernelAutoModules = false;
-    kernelExtraConfig = ''
-      BLK_DEV_RAM y
-      BLK_DEV_INITRD y
-      BLK_DEV_CRYPTOLOOP m
-      BLK_DEV_DM m
-      DM_CRYPT m
-      MD y
-      REISERFS_FS m
-      BTRFS_FS y
-      XFS_FS m
-      JFS_FS y
-      EXT4_FS y
-
-      IP_PNP y
-      IP_PNP_DHCP y
-      NFS_FS y
-      ROOT_NFS y
-      TUN m
-      NFS_V4 y
-      NFS_V4_1 y
-      NFS_FSCACHE y
-      NFSD m
-      NFSD_V2_ACL y
-      NFSD_V3 y
-      NFSD_V3_ACL y
-      NFSD_V4 y
-      NETFILTER y
-      IP_NF_IPTABLES y
-      IP_NF_FILTER y
-      IP_NF_MATCH_ADDRTYPE y
-      IP_NF_TARGET_LOG y
-      IP_NF_MANGLE y
-      IPV6 m
-      VLAN_8021Q m
-
-      CIFS y
-      CIFS_XATTR y
-      CIFS_POSIX y
-      CIFS_FSCACHE y
-      CIFS_ACL y
-
-      ZRAM m
-
-      # Disable OABI to have seccomp_filter (required for systemd)
-      # https://github.com/raspberrypi/firmware/issues/651
-      OABI_COMPAT n
-
-      # Fail to build
-      DRM n
-      SCSI_ADVANSYS n
-      USB_ISP1362_HCD n
-      SND_SOC n
-      SND_ALI5451 n
-      FB_SAVAGE n
-      SCSI_NSP32 n
-      ATA_SFF n
-      SUNGEM n
-      IRDA n
-      ATM_HE n
-      SCSI_ACARD n
-      BLK_DEV_CMD640_ENHANCED n
-
-      FUSE_FS m
-
-      # nixos mounts some cgroup
-      CGROUPS y
-
-      # Latencytop
-      LATENCYTOP y
-
-      # Disable the common config Xen, it doesn't build on ARM
-      XEN? n
-    '';
-    kernelTarget = "zImage";
-    uboot = null;
-  };
-
-  scaleway-c1 = armv7l-hf-multiplatform // {
-    gcc = {
-      cpu = "cortex-a9";
-      fpu = "vfpv3";
-      float = "hard";
-    };
-  };
-
-  utilite = {
-    name = "utilite";
-    kernelMajor = "2.6";
-    kernelHeadersBaseConfig = "multi_v7_defconfig";
-    kernelBaseConfig = "multi_v7_defconfig";
-    kernelArch = "arm";
-    kernelAutoModules = false;
-    kernelExtraConfig =
-      ''
-        # Ubi for the mtd
-        MTD_UBI y
-        UBIFS_FS y
-        UBIFS_FS_XATTR y
-        UBIFS_FS_ADVANCED_COMPR y
-        UBIFS_FS_LZO y
-        UBIFS_FS_ZLIB y
-        UBIFS_FS_DEBUG n
-      '';
-    kernelMakeFlags = [ "LOADADDR=0x10800000" ];
-    kernelTarget = "uImage";
-    kernelDTB = true;
-    uboot = true; #XXX: any non-null value here is needed so that mkimage is present to build kernelTarget uImage
-    gcc = {
-      cpu = "cortex-a9";
-      fpu = "neon";
-      float = "hard";
-    };
-  };
-
-  guruplug = sheevaplug // {
-    # Define `CONFIG_MACH_GURUPLUG' (see
-    # <http://kerneltrap.org/mailarchive/git-commits-head/2010/5/19/33618>)
-    # and other GuruPlug-specific things.  Requires the `guruplug-defconfig'
-    # patch.
-
-    kernelBaseConfig = "guruplug_defconfig";
-    #kernelHeadersBaseConfig = "guruplug_defconfig";
-  };
-
-  fuloong2f_n32 = {
-    name = "fuloong2f_n32";
-    kernelMajor = "2.6";
-    kernelHeadersBaseConfig = "fuloong2e_defconfig";
-    kernelBaseConfig = "lemote2f_defconfig";
-    kernelArch = "mips";
-    kernelAutoModules = false;
-    kernelExtraConfig = ''
-      MIGRATION n
-      COMPACTION n
-
-      # nixos mounts some cgroup
-      CGROUPS y
-
-      BLK_DEV_RAM y
-      BLK_DEV_INITRD y
-      BLK_DEV_CRYPTOLOOP m
-      BLK_DEV_DM m
-      DM_CRYPT m
-      MD y
-      REISERFS_FS m
-      EXT4_FS m
-      USB_STORAGE_CYPRESS_ATACB m
-
-      IP_PNP y
-      IP_PNP_DHCP y
-      IP_PNP_BOOTP y
-      NFS_FS y
-      ROOT_NFS y
-      TUN m
-      NFS_V4 y
-      NFS_V4_1 y
-      NFS_FSCACHE y
-      NFSD m
-      NFSD_V2_ACL y
-      NFSD_V3 y
-      NFSD_V3_ACL y
-      NFSD_V4 y
-
-      # Fail to build
-      DRM n
-      SCSI_ADVANSYS n
-      USB_ISP1362_HCD n
-      SND_SOC n
-      SND_ALI5451 n
-      FB_SAVAGE n
-      SCSI_NSP32 n
-      ATA_SFF n
-      SUNGEM n
-      IRDA n
-      ATM_HE n
-      SCSI_ACARD n
-      BLK_DEV_CMD640_ENHANCED n
-
-      FUSE_FS m
-
-      # Needed for udev >= 150
-      SYSFS_DEPRECATED_V2 n
-
-      VGA_CONSOLE n
-      VT_HW_CONSOLE_BINDING y
-      SERIAL_8250_CONSOLE y
-      FRAMEBUFFER_CONSOLE y
-      EXT2_FS y
-      EXT3_FS y
-      REISERFS_FS y
-      MAGIC_SYSRQ y
-
-      # The kernel doesn't boot at all, with FTRACE
-      FTRACE n
-    '';
-    kernelTarget = "vmlinux";
-    uboot = null;
-    gcc = {
-      arch = "loongson2f";
-      abi = "n32";
-    };
-  };
-
-  beaglebone = armv7l-hf-multiplatform // {
-    name = "beaglebone";
-    kernelBaseConfig = "omap2plus_defconfig";
-    kernelAutoModules = false;
-    kernelExtraConfig = ""; # TBD kernel config
-    kernelTarget = "zImage";
-    uboot = null;
-  };
-
-  armv7l-hf-multiplatform = {
-    name = "armv7l-hf-multiplatform";
-    kernelMajor = "2.6"; # Using "2.6" enables 2.6 kernel syscalls in glibc.
-    kernelHeadersBaseConfig = "multi_v7_defconfig";
-    kernelBaseConfig = "multi_v7_defconfig";
-    kernelArch = "arm";
-    kernelDTB = true;
-    kernelAutoModules = true;
-    kernelPreferBuiltin = true;
-    uboot = null;
-    kernelTarget = "zImage";
-    kernelExtraConfig = ''
-      # Fix broken sunxi-sid nvmem driver.
-      TI_CPTS y
-
-      # Hangs ODROID-XU4
-      ARM_BIG_LITTLE_CPUIDLE n
-    '';
-    gcc = {
-      # Some table about fpu flags:
-      # http://community.arm.com/servlet/JiveServlet/showImage/38-1981-3827/blogentry-103749-004812900+1365712953_thumb.png
-      # Cortex-A5: -mfpu=neon-fp16
-      # Cortex-A7 (rpi2): -mfpu=neon-vfpv4
-      # Cortex-A8 (beaglebone): -mfpu=neon
-      # Cortex-A9: -mfpu=neon-fp16
-      # Cortex-A15: -mfpu=neon-vfpv4
-
-      # More about FPU:
-      # https://wiki.debian.org/ArmHardFloatPort/VfpComparison
-
-      # vfpv3-d16 is what Debian uses and seems to be the best compromise: NEON is not supported in e.g. Scaleway or Tegra 2,
-      # and the above page suggests NEON is only an improvement with hand-written assembly.
-      arch = "armv7-a";
-      fpu = "vfpv3-d16";
-      float = "hard";
-
-      # For Raspberry Pi the 2 the best would be:
-      #   cpu = "cortex-a7";
-      #   fpu = "neon-vfpv4";
-    };
-  };
-
-  aarch64-multiplatform = {
-    name = "aarch64-multiplatform";
-    kernelMajor = "2.6"; # Using "2.6" enables 2.6 kernel syscalls in glibc.
-    kernelHeadersBaseConfig = "defconfig";
-    kernelBaseConfig = "defconfig";
-    kernelArch = "arm64";
-    kernelDTB = true;
-    kernelAutoModules = true;
-    kernelPreferBuiltin = true;
-    kernelExtraConfig = ''
-      # Raspberry Pi 3 stuff. Not needed for kernels >= 4.10.
-      ARCH_BCM2835 y
-      BCM2835_MBOX y
-      BCM2835_WDT y
-      RASPBERRYPI_FIRMWARE y
-      RASPBERRYPI_POWER y
-      SERIAL_8250_BCM2835AUX y
-      SERIAL_8250_EXTENDED y
-      SERIAL_8250_SHARE_IRQ y
-
-      # Cavium ThunderX stuff.
-      PCI_HOST_THUNDER_ECAM y
-
-      # The default (=y) forces us to have the XHCI firmware available in initrd,
-      # which our initrd builder can't currently do easily.
-      USB_XHCI_TEGRA m
-    '';
-    uboot = null;
-    kernelTarget = "Image";
-    gcc = {
-      arch = "armv8-a";
-    };
-  };
-
-  selectBySystem = system: {
-      "i686-linux" = pc32;
-      "x86_64-linux" = pc64;
-      "armv5tel-linux" = sheevaplug;
-      "armv6l-linux" = raspberrypi;
-      "armv7l-linux" = armv7l-hf-multiplatform;
-      "aarch64-linux" = aarch64-multiplatform;
-      "mips64el-linux" = fuloong2f_n32;
-    }.${system} or pcBase;
-}

lib/tests.nix

@@ -0,0 +1,223 @@
+let inherit (builtins) add; in
+with import ./default.nix;
+
+runTests {
+
+  testId = {
+    expr = id 1;
+    expected = 1;
+  };
+
+  testConst = {
+    expr = const 2 3;
+    expected = 2;
+  };
+
+  /*
+  testOr = {
+    expr = or true false;
+    expected = true;
+  };
+  */
+
+  testAnd = {
+    expr = and true false;
+    expected = false;
+  };
+
+  testFix = {
+    expr = fix (x: {a = if x ? a then "a" else "b";});
+    expected = {a = "a";};
+  };
+
+  testConcatMapStrings = {
+    expr = concatMapStrings (x: x + ";") ["a" "b" "c"];
+    expected = "a;b;c;";
+  };
+
+  testConcatStringsSep = {
+    expr = concatStringsSep "," ["a" "b" "c"];
+    expected = "a,b,c";
+  };
+
+  testFilter = {
+    expr = filter (x: x != "a") ["a" "b" "c" "a"];
+    expected = ["b" "c"];
+  };
+
+  testFold = {
+    expr = fold (builtins.add) 0 (range 0 100);
+    expected = 5050;
+  };
+
+  testTake = testAllTrue [
+    ([] == (take 0 [  1 2 3 ]))
+    ([1] == (take 1 [  1 2 3 ]))
+    ([ 1 2 ] == (take 2 [  1 2 3 ]))
+    ([ 1 2 3 ] == (take 3 [  1 2 3 ]))
+    ([ 1 2 3 ] == (take 4 [  1 2 3 ]))
+  ];
+
+  testFoldAttrs = {
+    expr = foldAttrs (n: a: [n] ++ a) [] [
+    { a = 2; b = 7; }
+    { a = 3;        c = 8; }
+    ];
+    expected = { a = [ 2 3 ]; b = [7]; c = [8];};
+  };
+
+  testOverridableDelayableArgsTest = {
+    expr =
+      let res1 = defaultOverridableDelayableArgs id {};
+          res2 = defaultOverridableDelayableArgs id { a = 7; };
+          res3 = let x = defaultOverridableDelayableArgs id { a = 7; };
+                 in (x.merge) { b = 10; };
+          res4 = let x = defaultOverridableDelayableArgs id { a = 7; };
+                in (x.merge) ( x: { b = 10; });
+          res5 = let x = defaultOverridableDelayableArgs id { a = 7; };
+                in (x.merge) ( x: { a = add x.a 3; });
+          res6 = let x = defaultOverridableDelayableArgs id { a = 7; mergeAttrBy = { a = add; }; };
+                     y = x.merge {};
+                in (y.merge) { a = 10; };
+
+          resRem7 = res6.replace (a : removeAttrs a ["a"]);
+
+          resReplace6 = let x = defaultOverridableDelayableArgs id { a = 7; mergeAttrBy = { a = add; }; };
+                            x2 = x.merge { a = 20; }; # now we have 27
+                        in (x2.replace) { a = 10; }; # and override the value by 10
+
+          # fixed tests (delayed args): (when using them add some comments, please)
+          resFixed1 =
+                let x = defaultOverridableDelayableArgs id ( x : { a = 7; c = x.fixed.b; });
+                    y = x.merge (x : { name = "name-${builtins.toString x.fixed.c}"; });
+                in (y.merge) { b = 10; };
+          strip = attrs : removeAttrs attrs ["merge" "replace"];
+      in all id
+        [ ((strip res1) == { })
+          ((strip res2) == { a = 7; })
+          ((strip res3) == { a = 7; b = 10; })
+          ((strip res4) == { a = 7; b = 10; })
+          ((strip res5) == { a = 10; })
+          ((strip res6) == { a = 17; })
+          ((strip resRem7) == {})
+          ((strip resFixed1) == { a = 7; b = 10; c =10; name = "name-10"; })
+        ];
+    expected = true;
+  };
+
+  testSort = {
+    expr = sort builtins.lessThan [ 40 2 30 42 ];
+    expected = [2 30 40 42];
+  };
+
+  testToIntShouldConvertStringToInt = {
+    expr = toInt "27";
+    expected = 27;
+  };
+
+  testToIntShouldThrowErrorIfItCouldNotConvertToInt = {
+    expr = builtins.tryEval (toInt "\"foo\"");
+    expected = { success = false; value = false; };
+  };
+
+  testHasAttrByPathTrue = {
+    expr = hasAttrByPath ["a" "b"] { a = { b = "yey"; }; };
+    expected = true;
+  };
+
+  testHasAttrByPathFalse = {
+    expr = hasAttrByPath ["a" "b"] { a = { c = "yey"; }; };
+    expected = false;
+  };
+
+
+  /* Generator tests */
+  # these tests assume attributes are converted to lists
+  # in alphabetical order
+
+  testMkKeyValueDefault = {
+    expr = generators.mkKeyValueDefault ":" "f:oo" "bar";
+    expected = ''f\:oo:bar'';
+  };
+
+  testToKeyValue = {
+    expr = generators.toKeyValue {} {
+      key = "value";
+      "other=key" = "baz";
+    };
+    expected = ''
+      key=value
+      other\=key=baz
+    '';
+  };
+
+  testToINIEmpty = {
+    expr = generators.toINI {} {};
+    expected = "";
+  };
+
+  testToINIEmptySection = {
+    expr = generators.toINI {} { foo = {}; bar = {}; };
+    expected = ''
+      [bar]
+
+      [foo]
+    '';
+  };
+
+  testToINIDefaultEscapes = {
+    expr = generators.toINI {} {
+      "no [ and ] allowed unescaped" = {
+        "and also no = in keys" = 42;
+      };
+    };
+    expected = ''
+      [no \[ and \] allowed unescaped]
+      and also no \= in keys=42
+    '';
+  };
+
+  testToINIDefaultFull = {
+    expr = generators.toINI {} {
+      "section 1" = {
+        attribute1 = 5;
+        x = "Me-se JarJar Binx";
+      };
+      "foo[]" = {
+        "he\\h=he" = "this is okay";
+      };
+    };
+    expected = ''
+      [foo\[\]]
+      he\h\=he=this is okay
+
+      [section 1]
+      attribute1=5
+      x=Me-se JarJar Binx
+    '';
+  };
+
+  /* right now only invocation check */
+  testToJSONSimple =
+    let val = {
+      foobar = [ "baz" 1 2 3 ];
+    };
+    in {
+      expr = generators.toJSON {} val;
+      # trival implementation
+      expected = builtins.toJSON val;
+  };
+
+  /* right now only invocation check */
+  testToYAMLSimple =
+    let val = {
+      list = [ { one = 1; } { two = 2; } ];
+      all = 42;
+    };
+    in {
+      expr = generators.toYAML {} val;
+      # trival implementation
+      expected = builtins.toJSON val;
+  };
+
+}

lib/tests/misc.nix

@@ -1,361 +0,0 @@
-# to run these tests:
-# nix-instantiate --eval --strict nixpkgs/lib/tests/misc.nix
-# if the resulting list is empty, all tests passed
-with import ../default.nix;
-
-runTests {
-
-
-# TRIVIAL
-
-  testId = {
-    expr = id 1;
-    expected = 1;
-  };
-
-  testConst = {
-    expr = const 2 3;
-    expected = 2;
-  };
-
-  /*
-  testOr = {
-    expr = or true false;
-    expected = true;
-  };
-  */
-
-  testAnd = {
-    expr = and true false;
-    expected = false;
-  };
-
-  testFix = {
-    expr = fix (x: {a = if x ? a then "a" else "b";});
-    expected = {a = "a";};
-  };
-
-  testComposeExtensions = {
-    expr = let obj = makeExtensible (self: { foo = self.bar; });
-               f = self: super: { bar = false; baz = true; };
-               g = self: super: { bar = super.baz or false; };
-               f_o_g = composeExtensions f g;
-               composed = obj.extend f_o_g;
-           in composed.foo;
-    expected = true;
-  };
-
-# STRINGS
-
-  testConcatMapStrings = {
-    expr = concatMapStrings (x: x + ";") ["a" "b" "c"];
-    expected = "a;b;c;";
-  };
-
-  testConcatStringsSep = {
-    expr = concatStringsSep "," ["a" "b" "c"];
-    expected = "a,b,c";
-  };
-
-  testSplitStringsSimple = {
-    expr = strings.splitString "." "a.b.c.d";
-    expected = [ "a" "b" "c" "d" ];
-  };
-
-  testSplitStringsEmpty = {
-    expr = strings.splitString "." "a..b";
-    expected = [ "a" "" "b" ];
-  };
-
-  testSplitStringsOne = {
-    expr = strings.splitString ":" "a.b";
-    expected = [ "a.b" ];
-  };
-
-  testSplitStringsNone = {
-    expr = strings.splitString "." "";
-    expected = [ "" ];
-  };
-
-  testSplitStringsFirstEmpty = {
-    expr = strings.splitString "/" "/a/b/c";
-    expected = [ "" "a" "b" "c" ];
-  };
-
-  testSplitStringsLastEmpty = {
-    expr = strings.splitString ":" "2001:db8:0:0042::8a2e:370:";
-    expected = [ "2001" "db8" "0" "0042" "" "8a2e" "370" "" ];
-  };
-
-  testIsStorePath =  {
-    expr =
-      let goodPath =
-            "${builtins.storeDir}/d945ibfx9x185xf04b890y4f9g3cbb63-python-2.7.11";
-      in {
-        storePath = isStorePath goodPath;
-        storePathAppendix = isStorePath
-          "${goodPath}/bin/python";
-        nonAbsolute = isStorePath (concatStrings (tail (stringToCharacters goodPath)));
-        asPath = isStorePath (builtins.toPath goodPath);
-        otherPath = isStorePath "/something/else";
-        otherVals = {
-          attrset = isStorePath {};
-          list = isStorePath [];
-          int = isStorePath 42;
-        };
-      };
-    expected = {
-      storePath = true;
-      storePathAppendix = false;
-      nonAbsolute = false;
-      asPath = true;
-      otherPath = false;
-      otherVals = {
-        attrset = false;
-        list = false;
-        int = false;
-      };
-    };
-  };
-
-# LISTS
-
-  testFilter = {
-    expr = filter (x: x != "a") ["a" "b" "c" "a"];
-    expected = ["b" "c"];
-  };
-
-  testFold =
-    let
-      f = op: fold: fold op 0 (range 0 100);
-      # fold with associative operator
-      assoc = f builtins.add;
-      # fold with non-associative operator
-      nonAssoc = f builtins.sub;
-    in {
-      expr = {
-        assocRight = assoc foldr;
-        # right fold with assoc operator is same as left fold
-        assocRightIsLeft = assoc foldr == assoc foldl;
-        nonAssocRight = nonAssoc foldr;
-        nonAssocLeft = nonAssoc foldl;
-        # with non-assoc operator the fold results are not the same
-        nonAssocRightIsNotLeft = nonAssoc foldl != nonAssoc foldr;
-        # fold is an alias for foldr
-        foldIsRight = nonAssoc fold == nonAssoc foldr;
-      };
-      expected = {
-        assocRight = 5050;
-        assocRightIsLeft = true;
-        nonAssocRight = 50;
-        nonAssocLeft = (-5050);
-        nonAssocRightIsNotLeft = true;
-        foldIsRight = true;
-      };
-    };
-
-  testTake = testAllTrue [
-    ([] == (take 0 [  1 2 3 ]))
-    ([1] == (take 1 [  1 2 3 ]))
-    ([ 1 2 ] == (take 2 [  1 2 3 ]))
-    ([ 1 2 3 ] == (take 3 [  1 2 3 ]))
-    ([ 1 2 3 ] == (take 4 [  1 2 3 ]))
-  ];
-
-  testFoldAttrs = {
-    expr = foldAttrs (n: a: [n] ++ a) [] [
-    { a = 2; b = 7; }
-    { a = 3;        c = 8; }
-    ];
-    expected = { a = [ 2 3 ]; b = [7]; c = [8];};
-  };
-
-  testSort = {
-    expr = sort builtins.lessThan [ 40 2 30 42 ];
-    expected = [2 30 40 42];
-  };
-
-  testToIntShouldConvertStringToInt = {
-    expr = toInt "27";
-    expected = 27;
-  };
-
-  testToIntShouldThrowErrorIfItCouldNotConvertToInt = {
-    expr = builtins.tryEval (toInt "\"foo\"");
-    expected = { success = false; value = false; };
-  };
-
-  testHasAttrByPathTrue = {
-    expr = hasAttrByPath ["a" "b"] { a = { b = "yey"; }; };
-    expected = true;
-  };
-
-  testHasAttrByPathFalse = {
-    expr = hasAttrByPath ["a" "b"] { a = { c = "yey"; }; };
-    expected = false;
-  };
-
-
-# GENERATORS
-# these tests assume attributes are converted to lists
-# in alphabetical order
-
-  testMkKeyValueDefault = {
-    expr = generators.mkKeyValueDefault ":" "f:oo" "bar";
-    expected = ''f\:oo:bar'';
-  };
-
-  testToKeyValue = {
-    expr = generators.toKeyValue {} {
-      key = "value";
-      "other=key" = "baz";
-    };
-    expected = ''
-      key=value
-      other\=key=baz
-    '';
-  };
-
-  testToINIEmpty = {
-    expr = generators.toINI {} {};
-    expected = "";
-  };
-
-  testToINIEmptySection = {
-    expr = generators.toINI {} { foo = {}; bar = {}; };
-    expected = ''
-      [bar]
-
-      [foo]
-    '';
-  };
-
-  testToINIDefaultEscapes = {
-    expr = generators.toINI {} {
-      "no [ and ] allowed unescaped" = {
-        "and also no = in keys" = 42;
-      };
-    };
-    expected = ''
-      [no \[ and \] allowed unescaped]
-      and also no \= in keys=42
-    '';
-  };
-
-  testToINIDefaultFull = {
-    expr = generators.toINI {} {
-      "section 1" = {
-        attribute1 = 5;
-        x = "Me-se JarJar Binx";
-      };
-      "foo[]" = {
-        "he\\h=he" = "this is okay";
-      };
-    };
-    expected = ''
-      [foo\[\]]
-      he\h\=he=this is okay
-
-      [section 1]
-      attribute1=5
-      x=Me-se JarJar Binx
-    '';
-  };
-
-  /* right now only invocation check */
-  testToJSONSimple =
-    let val = {
-      foobar = [ "baz" 1 2 3 ];
-    };
-    in {
-      expr = generators.toJSON {} val;
-      # trivial implementation
-      expected = builtins.toJSON val;
-  };
-
-  /* right now only invocation check */
-  testToYAMLSimple =
-    let val = {
-      list = [ { one = 1; } { two = 2; } ];
-      all = 42;
-    };
-    in {
-      expr = generators.toYAML {} val;
-      # trivial implementation
-      expected = builtins.toJSON val;
-  };
-
-  testToPretty = {
-    expr = mapAttrs (const (generators.toPretty {})) rec {
-      int = 42;
-      bool = true;
-      string = "fnord";
-      null_ = null;
-      function = x: x;
-      functionArgs = { arg ? 4, foo }: arg;
-      list = [ 3 4 function [ false ] ];
-      attrs = { foo = null; "foo bar" = "baz"; };
-      drv = derivation { name = "test"; system = builtins.currentSystem; };
-    };
-    expected = rec {
-      int = "42";
-      bool = "true";
-      string = "\"fnord\"";
-      null_ = "null";
-      function = "<λ>";
-      functionArgs = "<λ:{(arg),foo}>";
-      list = "[ 3 4 ${function} [ false ] ]";
-      attrs = "{ \"foo\" = null; \"foo bar\" = \"baz\"; }";
-      drv = "<δ>";
-    };
-  };
-
-  testToPrettyAllowPrettyValues = {
-    expr = generators.toPretty { allowPrettyValues = true; }
-             { __pretty = v: "«" + v + "»"; val = "foo"; };
-    expected  = "«foo»";
-  };
-
-
-# MISC
-
-  testOverridableDelayableArgsTest = {
-    expr =
-      let res1 = defaultOverridableDelayableArgs id {};
-          res2 = defaultOverridableDelayableArgs id { a = 7; };
-          res3 = let x = defaultOverridableDelayableArgs id { a = 7; };
-                 in (x.merge) { b = 10; };
-          res4 = let x = defaultOverridableDelayableArgs id { a = 7; };
-                in (x.merge) ( x: { b = 10; });
-          res5 = let x = defaultOverridableDelayableArgs id { a = 7; };
-                in (x.merge) ( x: { a = builtins.add x.a 3; });
-          res6 = let x = defaultOverridableDelayableArgs id { a = 7; mergeAttrBy = { a = builtins.add; }; };
-                     y = x.merge {};
-                in (y.merge) { a = 10; };
-
-          resRem7 = res6.replace (a: removeAttrs a ["a"]);
-
-          resReplace6 = let x = defaultOverridableDelayableArgs id { a = 7; mergeAttrBy = { a = builtins.add; }; };
-                            x2 = x.merge { a = 20; }; # now we have 27
-                        in (x2.replace) { a = 10; }; # and override the value by 10
-
-          # fixed tests (delayed args): (when using them add some comments, please)
-          resFixed1 =
-                let x = defaultOverridableDelayableArgs id ( x: { a = 7; c = x.fixed.b; });
-                    y = x.merge (x: { name = "name-${builtins.toString x.fixed.c}"; });
-                in (y.merge) { b = 10; };
-          strip = attrs: removeAttrs attrs ["merge" "replace"];
-      in all id
-        [ ((strip res1) == { })
-          ((strip res2) == { a = 7; })
-          ((strip res3) == { a = 7; b = 10; })
-          ((strip res4) == { a = 7; b = 10; })
-          ((strip res5) == { a = 10; })
-          ((strip res6) == { a = 17; })
-          ((strip resRem7) == {})
-          ((strip resFixed1) == { a = 7; b = 10; c =10; name = "name-10"; })
-        ];
-    expected = true;
-  };
-
-}

lib/tests/modules.sh

@@ -99,14 +99,6 @@ checkConfigOutput 'true' "$@" ./define-enable.nix ./define-loaOfSub-if-foo-enabl
 checkConfigOutput 'true' "$@" ./define-enable.nix ./define-loaOfSub-foo-if-enable.nix
 checkConfigOutput 'true' "$@" ./define-enable.nix ./define-loaOfSub-foo-enable-if.nix
 
-# Check disabledModules with config definitions and option declarations.
-set -- config.enable ./define-enable.nix ./declare-enable.nix
-checkConfigOutput "true" "$@"
-checkConfigOutput "false" "$@" ./disable-define-enable.nix
-checkConfigError "The option .*enable.* defined in .* does not exist" "$@" ./disable-declare-enable.nix
-checkConfigError "attribute .*enable.* in selection path .*config.enable.* not found" "$@" ./disable-define-enable.nix ./disable-declare-enable.nix
-checkConfigError "attribute .*enable.* in selection path .*config.enable.* not found" "$@" ./disable-enable-modules.nix
-
 # Check _module.args.
 set -- config.enable ./declare-enable.nix ./define-enable-with-custom-arg.nix
 checkConfigError 'while evaluating the module argument .*custom.* in .*define-enable-with-custom-arg.nix.*:' "$@"

lib/tests/modules/default.nix

@@ -1,8 +1,7 @@
-{ lib ? import ../.., modules ? [] }:
+{ lib ? import <nixpkgs/lib>, modules ? [] }:
 
 {
   inherit (lib.evalModules {
     inherit modules;
-    specialArgs.modulesPath = ./.;
   }) config options;
 }

lib/tests/modules/disable-declare-enable.nix

@@ -1,5 +0,0 @@
-{ lib, ... }:
-
-{
-  disabledModules = [ ./declare-enable.nix ];
-}

lib/tests/modules/disable-define-enable.nix

@@ -1,5 +0,0 @@
-{ lib, ... }:
-
-{
-  disabledModules = [ ./define-enable.nix ];
-}

lib/tests/modules/disable-enable-modules.nix

@@ -1,5 +0,0 @@
-{ lib, ... }:
-
-{
-  disabledModules = [ "define-enable.nix" "declare-enable.nix" ];
-}

lib/tests/release.nix

@@ -1,12 +1,15 @@
-{ pkgs ? import ((import ../.).cleanSource ../..) {} }:
+{ nixpkgs }:
 
-pkgs.stdenv.mkDerivation {
+with import ../.. { };
+with lib;
+
+stdenv.mkDerivation {
   name = "nixpkgs-lib-tests";
-  buildInputs = [ pkgs.nix ];
-  NIX_PATH="nixpkgs=${pkgs.path}";
+  buildInputs = [ nix ];
+  NIX_PATH="nixpkgs=${nixpkgs}";
 
   buildCommand = ''
-    datadir="${pkgs.nix}/share"
+    datadir="${nix}/share"
     export TEST_ROOT=$(pwd)/test-tmp
     export NIX_BUILD_HOOK=
     export NIX_CONF_DIR=$TEST_ROOT/etc
@@ -20,13 +23,9 @@ pkgs.stdenv.mkDerivation {
     cacheDir=$TEST_ROOT/binary-cache
     nix-store --init
 
-    cd ${pkgs.path}/lib/tests
+    cd ${nixpkgs}/lib/tests
     ./modules.sh
 
-    [[ "$(nix-instantiate --eval --strict misc.nix)" == "[ ]" ]]
-
-    [[ "$(nix-instantiate --eval --strict systems.nix)" == "[ ]" ]]
-
     touch $out
   '';
 }

lib/tests/systems.nix

@@ -1,31 +0,0 @@
-# We assert that the new algorithmic way of generating these lists matches the
-# way they were hard-coded before.
-#
-# One might think "if we exhaustively test, what's the point of procedurally
-# calculating the lists anyway?". The answer is one can mindlessly update these
-# tests as new platforms become supported, and then just give the diff a quick
-# sanity check before committing :).
-let
-  lib = import ../default.nix;
-  mseteq = x: y: {
-    expr     = lib.sort lib.lessThan x;
-    expected = lib.sort lib.lessThan y;
-  };
-in with lib.systems.doubles; lib.runTests {
-  all = assertTrue (mseteq all (linux ++ darwin ++ cygwin ++ freebsd ++ openbsd ++ netbsd ++ illumos));
-
-  arm = assertTrue (mseteq arm [ "armv5tel-linux" "armv6l-linux" "armv7l-linux" ]);
-  i686 = assertTrue (mseteq i686 [ "i686-linux" "i686-freebsd" "i686-netbsd" "i686-openbsd" "i686-cygwin" ]);
-  mips = assertTrue (mseteq mips [ "mips64el-linux" ]);
-  x86_64 = assertTrue (mseteq x86_64 [ "x86_64-linux" "x86_64-darwin" "x86_64-freebsd" "x86_64-openbsd" "x86_64-netbsd" "x86_64-cygwin" "x86_64-solaris" ]);
-
-  cygwin = assertTrue (mseteq cygwin [ "i686-cygwin" "x86_64-cygwin" ]);
-  darwin = assertTrue (mseteq darwin [ "x86_64-darwin" ]);
-  freebsd = assertTrue (mseteq freebsd [ "i686-freebsd" "x86_64-freebsd" ]);
-  gnu = assertTrue (mseteq gnu (linux /* ++ hurd ++ kfreebsd ++ ... */));
-  illumos = assertTrue (mseteq illumos [ "x86_64-solaris" ]);
-  linux = assertTrue (mseteq linux [ "i686-linux" "x86_64-linux" "armv5tel-linux" "armv6l-linux" "armv7l-linux" "aarch64-linux" "mips64el-linux" ]);
-  netbsd = assertTrue (mseteq netbsd [ "i686-netbsd" "x86_64-netbsd" ]);
-  openbsd = assertTrue (mseteq openbsd [ "i686-openbsd" "x86_64-openbsd" ]);
-  unix = assertTrue (mseteq unix (linux ++ darwin ++ freebsd ++ openbsd ++ netbsd ++ illumos));
-}

lib/trivial.nix

@@ -1,54 +1,86 @@
 rec {
 
-  /* The identity function
-     For when you need a function that does “nothing”.
-
-     Type: id :: a -> a
-  */
+  # Identity function.
   id = x: x;
 
-  /* The constant function
-     Ignores the second argument.
-     Or: Construct a function that always returns a static value.
-
-     Type: const :: a -> b -> a
-     Example:
-       let f = const 5; in f 10
-       => 5
-  */
+  # Constant function.
   const = x: y: x;
 
-
-  ## Named versions corresponding to some builtin operators.
-
-  /* Concat two strings */
+  # Named versions corresponding to some builtin operators.
   concat = x: y: x ++ y;
-
-  /* boolean “or” */
   or = x: y: x || y;
-
-  /* boolean “and” */
   and = x: y: x && y;
-
-  /* Convert a boolean to a string.
-     Note that toString on a bool returns "1" and "".
-  */
-  boolToString = b: if b then "true" else "false";
-
-  /* Merge two attribute sets shallowly, right side trumps left
-
-     Example:
-       mergeAttrs { a = 1; b = 2; } { b = 3; c = 4; }
-       => { a = 1; b = 3; c = 4; }
-  */
   mergeAttrs = x: y: x // y;
 
+  # Compute the fixed point of the given function `f`, which is usually an
+  # attribute set that expects its final, non-recursive representation as an
+  # argument:
+  #
+  #     f = self: { foo = "foo"; bar = "bar"; foobar = self.foo + self.bar; }
+  #
+  # Nix evaluates this recursion until all references to `self` have been
+  # resolved. At that point, the final result is returned and `f x = x` holds:
+  #
+  #     nix-repl> fix f
+  #     { bar = "bar"; foo = "foo"; foobar = "foobar"; }
+  #
+  # See https://en.wikipedia.org/wiki/Fixed-point_combinator for further
+  # details.
+  fix = f: let x = f x; in x;
+
+  # A variant of `fix` that records the original recursive attribute set in the
+  # result. This is useful in combination with the `extends` function to
+  # implement deep overriding. See pkgs/development/haskell-modules/default.nix
+  # for a concrete example.
+  fix' = f: let x = f x // { __unfix__ = f; }; in x;
+
+  # Modify the contents of an explicitly recursive attribute set in a way that
+  # honors `self`-references. This is accomplished with a function
+  #
+  #     g = self: super: { foo = super.foo + " + "; }
+  #
+  # that has access to the unmodified input (`super`) as well as the final
+  # non-recursive representation of the attribute set (`self`). `extends`
+  # differs from the native `//` operator insofar as that it's applied *before*
+  # references to `self` are resolved:
+  #
+  #     nix-repl> fix (extends g f)
+  #     { bar = "bar"; foo = "foo + "; foobar = "foo + bar"; }
+  #
+  # The name of the function is inspired by object-oriented inheritance, i.e.
+  # think of it as an infix operator `g extends f` that mimics the syntax from
+  # Java. It may seem counter-intuitive to have the "base class" as the second
+  # argument, but it's nice this way if several uses of `extends` are cascaded.
+  extends = f: rattrs: self: let super = rattrs self; in super // f self super;
+
+  # Create an overridable, recursive attribute set. For example:
+  #
+  #     nix-repl> obj = makeExtensible (self: { })
+  #
+  #     nix-repl> obj
+  #     { __unfix__ = «lambda»; extend = «lambda»; }
+  #
+  #     nix-repl> obj = obj.extend (self: super: { foo = "foo"; })
+  #
+  #     nix-repl> obj
+  #     { __unfix__ = «lambda»; extend = «lambda»; foo = "foo"; }
+  #
+  #     nix-repl> obj = obj.extend (self: super: { foo = super.foo + " + "; bar = "bar"; foobar = self.foo + self.bar; })
+  #
+  #     nix-repl> obj
+  #     { __unfix__ = «lambda»; bar = "bar"; extend = «lambda»; foo = "foo + "; foobar = "foo + bar"; }
+  makeExtensible = makeExtensibleWithCustomName "extend";
+
+  # Same as `makeExtensible` but the name of the extending attribute is
+  # customized.
+  makeExtensibleWithCustomName = extenderName: rattrs:
+    fix' rattrs // {
+      ${extenderName} = f: makeExtensibleWithCustomName extenderName (extends f rattrs);
+   };
+
   # Flip the order of the arguments of a binary function.
   flip = f: a: b: f b a;
 
-  # Apply function if argument is non-null
-  mapNullable = f: a: if isNull a then a else f a;
-
   # Pull in some builtins not included elsewhere.
   inherit (builtins)
     pathExists readFile isBool isFunction
@@ -70,16 +102,6 @@ rec {
   min = x: y: if x < y then x else y;
   max = x: y: if x > y then x else y;
 
-  /* Integer modulus
-
-     Example:
-       mod 11 10
-       => 1
-       mod 1 10
-       => 1
-  */
-  mod = base: int: base - (int * (builtins.div base int));
-
   /* Reads a JSON file. */
   importJSON = path:
     builtins.fromJSON (builtins.readFile path);

lib/types.nix

@@ -6,7 +6,7 @@ with import ./attrsets.nix;
 with import ./options.nix;
 with import ./trivial.nix;
 with import ./strings.nix;
-let inherit (import ./modules.nix) mergeDefinitions filterOverrides; in
+with {inherit (import ./modules.nix) mergeDefinitions filterOverrides; };
 
 rec {
 
@@ -52,7 +52,7 @@ rec {
     { # Human-readable representation of the type, should be equivalent to
       # the type function name.
       name
-    , # Description of the type, defined recursively by embedding the wrapped type if any.
+    , # Description of the type, defined recursively by embedding the the wrapped type if any.
       description ? null
     , # Function applied to each definition that should return true if
       # its type-correct, false otherwise.
@@ -81,7 +81,7 @@ rec {
       #   name: name of the type
       #   type: type function.
       #   wrapped: the type wrapped in case of compound types.
-      #   payload: values of the type, two payloads of the same type must be
+      #   payload: values of the type, two payloads of the same type must be 
       #            combinable with the binOp binary operation.
       #   binOp: binary operation that merge two payloads of the same type.
       functor ? defaultFunctor name
@@ -92,8 +92,6 @@ rec {
     };
 
 
-  # When adding new types don't forget to document them in
-  # nixos/doc/manual/development/option-types.xml!
   types = rec {
 
     unspecified = mkOptionType {
@@ -179,9 +177,9 @@ rec {
       description = "list of ${elemType.description}s";
       check = isList;
       merge = loc: defs:
-        map (x: x.value) (filter (x: x ? value) (concatLists (imap1 (n: def:
+        map (x: x.value) (filter (x: x ? value) (concatLists (imap (n: def:
           if isList def.value then
-            imap1 (m: def':
+            imap (m: def':
               (mergeDefinitions
                 (loc ++ ["[definition ${toString n}-entry ${toString m}]"])
                 elemType
@@ -220,7 +218,7 @@ rec {
           if isList def.value then
             { inherit (def) file;
               value = listToAttrs (
-                imap1 (elemIdx: elem:
+                imap (elemIdx: elem:
                   { name = elem.name or "unnamed-${toString defIdx}.${toString elemIdx}";
                     value = elem;
                   }) def.value);
@@ -233,7 +231,7 @@ rec {
         name = "loaOf";
         description = "list or attribute set of ${elemType.description}s";
         check = x: isList x || isAttrs x;
-        merge = loc: defs: attrOnly.merge loc (imap1 convertIfList defs);
+        merge = loc: defs: attrOnly.merge loc (imap convertIfList defs);
         getSubOptions = prefix: elemType.getSubOptions (prefix ++ ["<name?>"]);
         getSubModules = elemType.getSubModules;
         substSubModules = m: loaOf (elemType.substSubModules m);
@@ -259,7 +257,6 @@ rec {
       functor = (defaultFunctor name) // { wrapped = elemType; };
     };
 
-    # Value of given type but with no merging (i.e. `uniq list`s are not concatenated).
     uniq = elemType: mkOptionType rec {
       name = "uniq";
       inherit (elemType) description check;
@@ -270,7 +267,6 @@ rec {
       functor = (defaultFunctor name) // { wrapped = elemType; };
     };
 
-    # Null or value of ...
     nullOr = elemType: mkOptionType rec {
       name = "nullOr";
       description = "null or ${elemType.description}";
@@ -287,7 +283,6 @@ rec {
       functor = (defaultFunctor name) // { wrapped = elemType; };
     };
 
-    # A submodule (like typed attribute set). See NixOS manual.
     submodule = opts:
       let
         opts' = toList opts;
@@ -319,7 +314,6 @@ rec {
         };
       };
 
-    # A value from a set of allowed ones.
     enum = values:
       let
         show = v:
@@ -335,7 +329,6 @@ rec {
         functor = (defaultFunctor name) // { payload = values; binOp = a: b: unique (a ++ b); };
       };
 
-    # Either value of type `t1` or `t2`.
     either = t1: t2: mkOptionType rec {
       name = "either";
       description = "${t1.description} or ${t2.description}";
@@ -359,8 +352,6 @@ rec {
       functor = (defaultFunctor name) // { wrapped = [ t1 t2 ]; };
     };
 
-    # Either value of type `finalType` or `coercedType`, the latter is
-    # converted to `finalType` using `coerceFunc`.
     coercedTo = coercedType: coerceFunc: finalType:
       assert coercedType.getSubModules == null;
       mkOptionType rec {

maintainers/docker/.dockerignore

@@ -0,0 +1,14 @@
+*~
+,*
+.*.swp
+.*.swo
+result
+result-*
+/doc/NEWS.html
+/doc/NEWS.txt
+/doc/manual.html
+/doc/manual.pdf
+.version-suffix
+
+.DS_Store
+.git

maintainers/docker/Dockerfile

@@ -0,0 +1,12 @@
+FROM busybox
+
+RUN dir=`mktemp -d` && trap 'rm -rf "$dir"' EXIT && \
+    wget -O- https://nixos.org/releases/nix/nix-1.7/nix-1.7-x86_64-linux.tar.bz2  | bzcat | tar x -C $dir && \
+    mkdir -m 0755 /nix && USER=root sh $dir/*/install && \
+    echo ". /root/.nix-profile/etc/profile.d/nix.sh" >> /etc/profile
+
+ADD . /root/nix/nixpkgs
+ONBUILD ENV NIX_PATH nixpkgs=/root/nix/nixpkgs:nixos=/root/nix/nixpkgs/nixos
+ONBUILD ENV PATH /root/.nix-profile/bin:/root/.nix-profile/sbin:/bin:/sbin:/usr/bin:/usr/sbin
+ONBUILD ENV ENV /etc/profile
+ENV ENV /etc/profile

maintainers/scripts/all-tarballs.nix

@@ -14,5 +14,5 @@ removeAttrs (import ../../pkgs/top-level/release.nix
     supportedSystems = [ "x86_64-linux" ];
   })
   [ # Remove jobs whose evaluation depends on a writable Nix store.
-    "tarball" "unstable" "darwin-tested"
+    "tarball" "unstable"
   ]

maintainers/scripts/gnome.sh

@@ -2,11 +2,11 @@
 
 set -o pipefail
 
-GNOME_FTP=ftp.gnome.org/pub/GNOME/sources
+GNOME_FTP="ftp.gnome.org/pub/GNOME/sources"
 
 # projects that don't follow the GNOME major versioning, or that we don't want to
 # programmatically update
-NO_GNOME_MAJOR="ghex gtkhtml gdm"
+NO_GNOME_MAJOR="gtkhtml gdm"
 
 usage() {
   echo "Usage: $0 gnome_dir <show project>|<update project>|<update-all> [major.minor]" >&2
@@ -18,10 +18,10 @@ if [ "$#" -lt 2 ]; then
   usage
 fi
 
-GNOME_TOP=$1
+GNOME_TOP="$1"
 shift
 
-action=$1
+action="$1"
 
 # curl -l ftp://... doesn't work from my office in HSE, and I don't want to have
 # any conversations with sysadmin. Somehow lftp works.
@@ -36,18 +36,18 @@ else
 fi
 
 find_project() {
-  exec find "$GNOME_TOP" -mindepth 2 -maxdepth 2 -type d "$@"
+  exec find "$GNOME_TOP" -mindepth 2 -maxdepth 2 -type d $@
 }
 
 show_project() {
-  local project=$1
-  local majorVersion=$2
-  local version=
+  local project="$1"
+  local majorVersion="$2"
+  local version=""
 
   if [ -z "$majorVersion" ]; then
     echo "Looking for available versions..." >&2
-    local available_baseversions=$(ls_ftp ftp://${GNOME_FTP}/${project} | grep '[0-9]\.[0-9]' | sort -t. -k1,1n -k 2,2n)
-    if [ "$?" -ne 0 ]; then
+    local available_baseversions=( `ls_ftp ftp://${GNOME_FTP}/${project} | grep '[0-9]\.[0-9]' | sort -t. -k1,1n -k 2,2n` )
+    if [ "$?" -ne "0" ]; then
       echo "Project $project not found" >&2
       return 1
     fi
@@ -59,11 +59,11 @@ show_project() {
   
   if echo "$majorVersion" | grep -q "[0-9]\+\.[0-9]\+\.[0-9]\+"; then
     # not a major version
-    version=$majorVersion
+    version="$majorVersion"
     majorVersion=$(echo "$majorVersion" | cut -d '.' -f 1,2)
   fi
   
-  local FTPDIR=${GNOME_FTP}/${project}/${majorVersion}
+  local FTPDIR="${GNOME_FTP}/${project}/${majorVersion}"
   
   #version=`curl -l ${FTPDIR}/ 2>/dev/null | grep LATEST-IS | sed -e s/LATEST-IS-//`
   # gnome's LATEST-IS is broken. Do not trust it.
@@ -92,7 +92,7 @@ show_project() {
   		esac
   	done
   	echo "Found versions ${!versions[@]}" >&2
-  	version=$(echo ${!versions[@]} | sed -e 's/ /\n/g' | sort -t. -k1,1n -k 2,2n -k 3,3n | tail -n1)
+  	version=`echo ${!versions[@]} | sed -e 's/ /\n/g' | sort -t. -k1,1n -k 2,2n -k 3,3n | tail -n1`
         if [ -z "$version" ]; then
           echo "No version available for major $majorVersion" >&2
           return 1
@@ -103,7 +103,7 @@ show_project() {
   
   local name=${project}-${version}
   echo "Fetching .sha256 file" >&2
-  local sha256out=$(curl -s -f http://"${FTPDIR}"/"${name}".sha256sum)
+  local sha256out=$(curl -s -f http://${FTPDIR}/${name}.sha256sum)
   
   if [ "$?" -ne "0" ]; then
   	echo "Version not found" >&2
@@ -136,8 +136,8 @@ fetchurl: {
 }
 
 update_project() {
-  local project=$1
-  local majorVersion=$2
+  local project="$1"
+  local majorVersion="$2"
 
   # find project in nixpkgs tree
   projectPath=$(find_project -name "$project" -print)
@@ -150,14 +150,14 @@ update_project() {
   
   if [ "$?" -eq "0" ]; then
     echo "Updating $projectPath/src.nix" >&2
-    echo -e "$src" > "$projectPath"/src.nix
+    echo -e "$src" > "$projectPath/src.nix"
   fi
 
   return 0
 }
 
-if [ "$action" = "update-all" ]; then
-  majorVersion=$2
+if [ "$action" == "update-all" ]; then
+  majorVersion="$2"
   if [ -z "$majorVersion" ]; then
     echo "No major version specified" >&2
     usage
@@ -170,23 +170,23 @@ if [ "$action" = "update-all" ]; then
       echo "Skipping $project"
     else
       echo "= Updating $project to $majorVersion" >&2
-      update_project "$project" "$majorVersion"
+      update_project $project $majorVersion
       echo >&2
     fi
   done
 else
-  project=$2
-  majorVersion=$3
+  project="$2"
+  majorVersion="$3"
 
   if [ -z "$project" ]; then
     echo "No project specified, exiting" >&2
     usage
   fi
 
-  if [ "$action" = show ]; then
-    show_project "$project" "$majorVersion"
-  elif [ "$action" = update ]; then
-    update_project "$project" "$majorVersion"
+  if [ "$action" == "show" ]; then
+    show_project $project $majorVersion
+  elif [ "$action" == "update" ]; then
+    update_project $project $majorVersion
   else
     echo "Unknown action $action" >&2
     usage

maintainers/scripts/hydra-eval-failures.py

@@ -5,7 +5,6 @@
 
 import subprocess
 import json
-import sys
 
 import click
 import requests
@@ -31,28 +30,25 @@ EVAL_FILE = {
 
 
 def get_maintainers(attr_name):
-    try:
-        nixname = attr_name.split('.')
-        meta_json = subprocess.check_output([
-            'nix-instantiate',
-            '--eval',
-            '--strict',
-            '-A',
-            '.'.join(nixname[1:]) + '.meta',
-            EVAL_FILE[nixname[0]],
-            '--json'])
-        meta = json.loads(meta_json)
-        if meta.get('maintainers'):
-            return [MAINTAINERS[name] for name in meta['maintainers'] if MAINTAINERS.get(name)]
-    except:
-       return []
+    nixname = attr_name.split('.')
+    meta_json = subprocess.check_output([
+        'nix-instantiate',
+        '--eval',
+        '--strict',
+        '-A',
+        '.'.join(nixname[1:]) + '.meta',
+        EVAL_FILE[nixname[0]],
+        '--json'])
+    meta = json.loads(meta_json)
+    if meta.get('maintainers'):
+        return [MAINTAINERS[name] for name in meta['maintainers'] if MAINTAINERS.get(name)]
 
 
 @click.command()
 @click.option(
     '--jobset',
-    default="nixos/release-17.03",
-    help='Hydra project like nixos/release-17.03')
+    default="nixos/release-16.09",
+    help='Hydra project like nixos/release-16.09')
 def cli(jobset):
     """
     Given a Hydra project, inspect latest evaluation
@@ -77,18 +73,14 @@ def cli(jobset):
     # TODO: dependency failed without propagated builds
     for tr in d('img[alt="Failed"]').parents('tr'):
         a = pq(tr)('a')[1]
-        print("- [ ] [{}]({})".format(a.text, a.get('href')))
-
-        sys.stdout.flush()
+        print "- [ ] [{}]({})".format(a.text, a.get('href'))
 
         maintainers = get_maintainers(a.text)
         if maintainers:
-            print("  - maintainers: {}".format(", ".join(map(lambda u: '@' + u, maintainers))))
+            print "  - maintainers: {}".format(", ".join(map(lambda u: '@' + u, maintainers)))
         # TODO: print last three persons that touched this file
         # TODO: pinpoint the diff that broke this build, or maybe it's transient or maybe it never worked?
 
-        sys.stdout.flush()
-
 
 if __name__ == "__main__":
     try:

maintainers/scripts/nix-diff.sh

@@ -1,277 +0,0 @@
-#!/usr/bin/env nix-shell
-#! nix-shell -i bash -p coreutils gnugrep gnused
-
-################################################################################
-# nix-diff.sh                                                                  #
-################################################################################
-# This script "diffs" Nix profile generations.                                 #
-#                                                                              #
-# Example:                                                                     #
-################################################################################
-# > nix-diff.sh 90 92                                                          #
-# + gnumake-4.2.1                                                              #
-# + gnumake-4.2.1-doc                                                          #
-# - htmldoc-1.8.29                                                             #
-################################################################################
-# The example shows that as of generation 92 and since generation 90,          #
-# gnumake-4.2.1 and gnumake-4.2.1-doc have been installed, while               #
-# htmldoc-1.8.29 has been removed.                                             #
-#                                                                              #
-# The example above shows the default, minimal output mode of this script.     #
-# For more features, run `nix-diff.sh -h` for usage instructions.              #
-################################################################################
-
-usage() {
-    cat <<EOF
-usage: nix-diff.sh [-h | [-p profile | -s] [-q] [-l] [range]]
--h:         print this message before exiting
--q:         list the derivations installed in the parent generation
--l:         diff every available intermediate generation between parent and
-            child
--p profile: specify the Nix profile to use
-            * defaults to ~/.nix-profile
--s:         use the system profile
-            * equivalent to: -p /nix/var/nix/profiles/system
-profile:    * should be something like /nix/var/nix/profiles/default, not a
-              generation link like /nix/var/nix/profiles/default-2-link
-range:      the range of generations to diff
-            * the following patterns are allowed, where A, B, and N are positive
-              integers, and G is the currently active generation:
-                A..B => diffs from generation A to generation B
-                ~N   => diffs from the Nth newest generation (older than G) to G
-                A    => diffs from generation A to G
-            * defaults to ~1
-EOF
-}
-
-usage_tip() {
-    echo 'run `nix-diff.sh -h` for usage instructions' >&2
-    exit 1
-}
-
-while getopts :hqlp:s opt; do
-    case $opt in
-        h)
-            usage
-            exit
-            ;;
-        q)
-            opt_query=1
-            ;;
-        l)
-            opt_log=1
-            ;;
-        p)
-            opt_profile=$OPTARG
-            ;;
-        s)
-            opt_profile=/nix/var/nix/profiles/system
-            ;;
-        \?)
-            echo "error: invalid option -$OPTARG" >&2
-            usage_tip
-            ;;
-    esac
-done
-shift $((OPTIND-1))
-
-if [ -n "$opt_profile" ]; then
-    if ! [ -L "$opt_profile" ]; then
-        echo "error: expecting \`$opt_profile\` to be a symbolic link" >&2
-        usage_tip
-    fi
-else
-    opt_profile=$(readlink ~/.nix-profile)
-    if (( $? != 0 )); then
-        echo 'error: unable to dereference `~/.nix-profile`' >&2
-        echo 'specify the profile manually with the `-p` flag' >&2
-        usage_tip
-    fi
-fi
-
-list_gens() {
-    nix-env -p "$opt_profile" --list-generations \
-        | sed -r 's:^\s*::' \
-        | cut -d' ' -f1
-}
-
-current_gen() {
-    nix-env -p "$opt_profile" --list-generations \
-        | grep -E '\(current\)\s*$' \
-        | sed -r 's:^\s*::' \
-        | cut -d' ' -f1
-}
-
-neg_gen() {
-    local i=0 from=$1 n=$2 tmp
-    for gen in $(list_gens | sort -rn); do
-        if ((gen < from)); then
-            tmp=$gen
-            ((i++))
-            ((i == n)) && break
-        fi
-    done
-    if ((i < n)); then
-        echo -n "error: there aren't $n generation(s) older than" >&2
-        echo " generation $from" >&2
-        return 1
-    fi
-    echo $tmp
-}
-
-match() {
-    argv=("$@")
-    for i in $(seq $(($#-1))); do
-        if grep -E "^${argv[$i]}\$" <(echo "$1") >/dev/null; then
-            echo $i
-            return
-        fi
-    done
-    echo 0
-}
-
-case $(match "$1" '' '[0-9]+' '[0-9]+\.\.[0-9]+' '~[0-9]+') in
-    1)
-        diffTo=$(current_gen)
-        diffFrom=$(neg_gen $diffTo 1)
-        (($? == 1)) && usage_tip
-        ;;
-    2)
-        diffFrom=$1
-        diffTo=$(current_gen)
-        ;;
-    3)
-        diffFrom=${1%%.*}
-        diffTo=${1##*.}
-        ;;
-    4)
-        diffTo=$(current_gen)
-        diffFrom=$(neg_gen $diffTo ${1#*~})
-        (($? == 1)) && usage_tip
-        ;;
-    0)
-        echo 'error: invalid invocation' >&2
-        usage_tip
-        ;;
-esac
-
-dirA="${opt_profile}-${diffFrom}-link"
-dirB="${opt_profile}-${diffTo}-link"
-
-declare -a temp_files
-temp_length() {
-    echo -n ${#temp_files[@]}
-}
-temp_make() {
-    temp_files[$(temp_length)]=$(mktemp)
-}
-temp_clean() {
-    rm -f ${temp_files[@]}
-}
-temp_name() {
-    echo -n "${temp_files[$(($(temp_length)-1))]}"
-}
-trap 'temp_clean' EXIT
-
-temp_make
-versA=$(temp_name)
-refs=$(nix-store -q --references "$dirA")
-(( $? != 0 )) && exit 1
-echo "$refs" \
-    | grep -v env-manifest.nix \
-    | sort \
-          > "$versA"
-
-print_tag() {
-    local gen=$1
-    nix-env -p "$opt_profile" --list-generations \
-        | grep -E "^\s*${gen}" \
-        | sed -r 's:^\s*::' \
-        | sed -r 's:\s*$::'
-}
-
-if [ -n "$opt_query" ]; then
-    print_tag $diffFrom
-    cat "$versA" \
-        | sed -r 's:^[^-]+-(.*)$:    \1:'
-
-    print_line=1
-fi
-
-if [ -n "$opt_log" ]; then
-    gens=$(for gen in $(list_gens); do
-               ((diffFrom < gen && gen < diffTo)) && echo $gen
-           done)
-    # Force the $diffTo generation to be included in this list, instead of using
-    # `gen <= diffTo` in the preceding loop, so we encounter an error upon the
-    # event of its nonexistence.
-    gens=$(echo "$gens"
-           echo $diffTo)
-else
-    gens=$diffTo
-fi
-
-temp_make
-add=$(temp_name)
-temp_make
-rem=$(temp_name)
-temp_make
-out=$(temp_name)
-
-for gen in $gens; do
-
-    [ -n "$print_line" ] && echo
-
-    temp_make
-    versB=$(temp_name)
-
-    dirB="${opt_profile}-${gen}-link"
-    refs=$(nix-store -q --references "$dirB")
-    (( $? != 0 )) && exit 1
-    echo "$refs" \
-        | grep -v env-manifest.nix \
-        | sort \
-              > "$versB"
-
-    in=$(comm -3 -1 "$versA" "$versB")
-    sed -r 's:^[^-]*-(.*)$:\1+:' <(echo "$in") \
-        | sort -f \
-               > "$add"
-
-    un=$(comm -3 -2 "$versA" "$versB")
-    sed -r 's:^[^-]*-(.*)$:\1-:' <(echo "$un") \
-        | sort -f \
-               > "$rem"
-
-    cat "$rem" "$add" \
-        | sort -f \
-        | sed -r 's:(.*)-$:- \1:' \
-        | sed -r 's:(.*)\+$:\+ \1:' \
-        | grep -v '^$' \
-              > "$out"
-
-    if [ -n "$opt_query" -o -n "$opt_log" ]; then
-
-        lines=$(wc -l "$out" | cut -d' ' -f1)
-        tag=$(print_tag "$gen")
-        (( $? != 0 )) && exit 1
-        if [ $lines -eq 0 ]; then
-            echo "$tag   (no change)"
-        else
-            echo "$tag"
-        fi
-        cat "$out" \
-            | sed 's:^:    :'
-
-        print_line=1
-
-    else
-        echo "diffing from generation $diffFrom to $diffTo"
-        cat "$out"
-    fi
-
-    versA=$versB
-
-done
-
-exit 0

maintainers/scripts/rebuild-amount.sh

@@ -1,115 +1,260 @@
-#!/usr/bin/env bash
-set -e
+#!/bin/sh
 
-if [ "$#" != 1 ] && [ "$#" != 2 ]; then
-	cat <<-EOF
-	Usage: $0 commit-spec [commit-spec]
-	    You need to be in a git-controlled nixpkgs tree.
-	    The current state of the tree will be used if the second commit is missing.
-	EOF
-	exit 1
-fi
+usage () {
+  echo 1>&2 "
+usage:
+  $0
+    [--git commit..commit | --git commit]
+    [--svn rev:rev | --svn rev]
+    [--path path[:path]*]
+    [--help]
 
-# A slightly hacky way to get the config.
-parallel="$(echo 'config.rebuild-amount.parallel or false' | nix-repl . 2>/dev/null \
-			| grep -v '^\(nix-repl.*\)\?$' | tail -n 1 || true)"
+This program is used to investigate how any changes inside your nixpkgs
+repository may hurt.  With these kind of information you may choose wisely
+where you should commit your changes.
 
-echo "Estimating rebuild amount by counting changed Hydra jobs."
+This program adapts it-self to your versionning system to avoid too much
+effort on your Internet bandwidth.  If you need to check more than one
+commits / revisions, you may use the following commands:
 
-toRemove=()
+  --git remotes/trunk..master
+  --svn 17670:17677
 
-cleanup() {
-	rm -rf "${toRemove[@]}"
-}
-trap cleanup EXIT SIGINT SIGQUIT ERR
+    Check the differences between each commit separating the first and the
+    last commit.
 
-MKTEMP='mktemp --tmpdir nix-rebuild-amount-XXXXXXXX'
+  --path /etc/nixos/nixpkgs:/tmp/nixpkgs_1:/tmp/nixpkgs_2
 
-nixexpr() {
-	cat <<-EONIX
-		let
-		  lib = import $1/lib;
-		  hydraJobs = import $1/pkgs/top-level/release.nix
-		    # Compromise: accuracy vs. resources needed for evaluation.
-		    { supportedSystems = cfg.systems or [ "x86_64-linux" "x86_64-darwin" ]; };
-		  cfg = (import $1 {}).config.rebuild-amount or {};
+    Check the differences between multiple directories containing different
+    versions of nixpkgs.
 
-		  recurseIntoAttrs = attrs: attrs // { recurseForDerivations = true; };
+All these options exist with one commit / revision argument.  Such options
+are used to compare your \$NIXPKGS path with the specified version.
 
-		  # hydraJobs leaves recurseForDerivations as empty attrmaps;
-		  # that would break nix-env and we also need to recurse everywhere.
-		  tweak = lib.mapAttrs
-		    (name: val:
-		      if name == "recurseForDerivations" then true
-		      else if lib.isAttrs val && val.type or null != "derivation"
-		              then recurseIntoAttrs (tweak val)
-		      else val
-		    );
+If you omit to mention any other commit / revision, then your \$NIXPKGS path
+is compared with its last update.  This command is useful to test code from
+a dirty repository.
 
-		  # Some of these contain explicit references to platform(s) we want to avoid;
-		  # some even (transitively) depend on ~/.nixpkgs/config.nix (!)
-		  blacklist = [
-		    "tarball" "metrics" "manual"
-		    "darwin-tested" "unstable" "stdenvBootstrapTools"
-		    "moduleSystem" "lib-tests" # these just confuse the output
-		  ];
-		
-		in
-		  tweak (builtins.removeAttrs hydraJobs blacklist)
-	EONIX
+"
+
+  exit 1;
 }
 
-# Output packages in tree $2 that weren't in $1.
-# Changing the output hash or name is taken as a change.
-# Extra nix-env parameters can be in $3
-newPkgs() {
-	# We use files instead of pipes, as running multiple nix-env processes
-	# could eat too much memory for a standard 4GiB machine.
-	local -a list
-	for i in 1 2; do
-		local l="$($MKTEMP)"
-		list[$i]="$l"
-		toRemove+=("$l")
+#####################
+# Process Arguments #
+#####################
 
-		local expr="$($MKTEMP)"
-		toRemove+=("$expr")
-		nixexpr "${!i}" > "$expr"
+: ${NIXPKGS=/etc/nixos/nixpkgs/}
 
-		nix-env -f "$expr" -qaP --no-name --out-path --show-trace $3 \
-			| sort > "${list[$i]}" &
+vcs=""
+gitCommits=""
+svnRevisions=""
+pathLocations=""
+verbose=false
 
-		if [ "$parallel" != "true" ]; then
-			wait
-		fi
-	done
-
-	wait
-	comm -13 "${list[@]}"
-}
-
-# Prepare nixpkgs trees.
-declare -a tree
-for i in 1 2; do
-	if [ -n "${!i}" ]; then # use the given commit
-		dir="$($MKTEMP -d)"
-		tree[$i]="$dir"
-		toRemove+=("$dir")
-
-		git clone --shared --no-checkout --quiet . "${tree[$i]}"
-		(cd "${tree[$i]}" && git checkout --quiet "${!i}")
-	else #use the current tree
-		tree[$i]="$(pwd)"
-	fi
+argfun=""
+for arg; do
+  if test -z "$argfun"; then
+    case $arg in
+      --git) vcs="git"; argfun="set_gitCommits";;
+      --svn) vcs="svn"; argfun="set_svnRevisions";;
+      --path) vcs="path"; argfun="set_pathLocations";;
+      --verbose) verbose=true;;
+      --help) usage;;
+      *) usage;;
+    esac
+  else
+    case $argfun in
+      set_*)
+        var=$(echo $argfun | sed 's,^set_,,')
+        eval $var=$arg
+        ;;
+    esac
+    argfun=""
+  fi
 done
 
-newlist="$($MKTEMP)"
-toRemove+=("$newlist")
-# Notes:
-#	- the evaluation is done on x86_64-linux, like on Hydra.
-#	- using $newlist file so that newPkgs() isn't in a sub-shell (because of toRemove)
-newPkgs "${tree[1]}" "${tree[2]}" '--argstr system "x86_64-linux"' > "$newlist"
+if $verbose; then
+  set -x
+else
+  set +x
+fi
 
-# Hacky: keep only the last word of each attribute path and sort.
-sed -n 's/\([^. ]*\.\)*\([^. ]*\) .*$/\2/p' < "$newlist" \
-	| sort | uniq -c
+############################
+# Find the repository type #
+############################
 
+if test -z "$vcs"; then
+  if test -x "$NIXPKGS/.git"; then
+    if git --git-dir="$NIXPKGS/.git" branch > /dev/null 2>&1; then
+      vcs="git"
+      gitCommits=$(git --git-dir="$NIXPKGS/.git" log -n 1 --pretty=format:%H 2> /dev/null)
+    fi
+  elif test -x "$NIXPKGS/.svn"; then
+    cd "$NIXPKGS"
+    if svn info > /dev/null 2>&1; then
+      vcs="svn";
+      svnRevisions=$(svn info | sed -n 's,Revision: ,,p')
+    fi
+    cd -
+  else
+    usage
+  fi
+fi
+
+###############################
+# Define a storage directory. #
+###############################
+
+pkgListDir=""
+exitCode=1
+cleanup(){
+  test -e "$pkgListDir" && rm -rf "$pkgListDir"
+  exit $exitCode;
+}
+
+trap cleanup EXIT SIGINT SIGQUIT ERR
+
+pkgListDir=$(mktemp --tmpdir -d rebuild-amount-XXXXXXXX)
+vcsDir="$pkgListDir/.vcs"
+
+###########################
+# Versionning for Dummies #
+###########################
+
+path_init() {
+  if test "${pathLocations#*:}" = "$pathLocations"; then
+    pathLocations="$NIXPKGS:$pathLocations"
+  fi
+  pathLocations="${pathLocations}:"
+}
+
+path_getNext() {
+  pathLoc="${pathLocations%%:*}"
+  pathLocations="${pathLocations#*:}"
+}
+
+path_setPath() {
+  path="$pathLoc"
+}
+
+path_setName() {
+  name=$(echo "$pathLoc" | tr '/' '_')
+}
+
+################
+# Git Commands #
+################
+
+git_init() {
+  git clone "$NIXPKGS/.git" "$vcsDir" > /dev/null 2>&1
+  if echo "gitCommits" | grep -c "\.\." > /dev/null 2>&1; then
+    gitCommits=$(git --git-dir="$vcsDir/.git" log --reverse --pretty=format:%H $gitCommits 2> /dev/null)
+  else
+    pathLocations="$vcsDir:$NIXPKGS"
+    vcs="path"
+    path_init
+  fi
+}
+
+git_getNext() {
+  git --git-dir="$vcsDir/.git" checkout $(echo "$gitCommits" | head -n 1) > /dev/null 2>&1
+  gitCommits=$(echo "$gitCommits" | sed '1 d')
+}
+
+git_setPath() {
+  path="$vcsDir"
+}
+
+git_setName() {
+  name=$(git --git-dir="$vcsDir/.git" log -n 1 --pretty=format:%H  2> /dev/null)
+}
+
+#######################
+# Subversion Commands #
+#######################
+
+svn_init() {
+  cp -r "$NIXPKGS" "$vcsDir" > /dev/null 2>&1
+  if echo "svnRevisions" | grep -c ":" > /dev/null 2>&1; then
+    svnRevisions=$(seq ${svnRevisions%:*} ${svnRevisions#*:})
+  else
+    pathLocations="$vcsDir:$NIXPKGS"
+    vcs="path"
+    path_init
+  fi
+}
+
+svn_getNext() {
+  cd "$vcsDir"
+  svn checkout $(echo "$svnRevisions" | head -n 1) > /dev/null 2>&1
+  cd -
+  svnRevisions=$(echo "$svnRevisions" | sed '1 d')
+}
+
+svn_setPath() {
+  path="$vcsDir"
+}
+
+svn_setName() {
+  name=$(svn info  2> /dev/null | sed -n 's,Revision: ,,p')
+}
+
+####################
+# Logical Commands #
+####################
+
+init    () { ${vcs}_init; }
+getNext () { ${vcs}_getNext; }
+setPath () { ${vcs}_setPath; }
+setName () { ${vcs}_setName; }
+
+
+#####################
+# Check for Rebuild #
+#####################
+
+# Generate the list of all derivations that could be build from a nixpkgs
+# respository.  This list of derivation hashes is compared with previous
+# lists and a brief summary is produced on the output.
+
+compareNames () {
+    nb=$(diff -y --suppress-common-lines --speed-large-files "$pkgListDir/$1.drvs" "$pkgListDir/$2.drvs" 2> /dev/null | wc -l)
+    echo "$1 -> $2: $nb"
+}
+
+echo "Please wait, this may take some minutes ..."
+
+init
+first=""
+oldPrev=""
+
+prev=""
+curr=""
+
+while true; do
+  getNext
+  setPath # set path=...
+  setName # set name=...
+  curr="$name"
+
+  test -z "$curr" && break || true
+
+  nix-instantiate "$path" > "$pkgListDir/$curr.drvs" > /dev/null 2>&1 || true
+
+  if test -n "$prev"; then
+    compareNames "$prev" "$curr"
+  else
+    echo "Number of package to rebuild:"
+    first="$curr"
+  fi
+  oldPrev="$prev"
+  prev="$curr"
+done
+
+if test "$first" != "$oldPrev"; then
+  echo "Number of package to rebuild (first -> last):"
+  compareNames "$first" "$curr"
+fi
+
+exitCode=0

maintainers/scripts/travis-nox-review-pr.sh

@@ -53,8 +53,8 @@ while test -n "$1"; do
         nox)
             echo "=== Fetching Nox from binary cache"
 
-            # build nox (+ a basic nix-shell env) silently so it's not in the log
-            nix-shell -p nox stdenv --command true
+            # build nox silently so it's not in the log
+            nix-build "<nixpkgs>" -A nox -A stdenv
             ;;
 
         pr)

maintainers/scripts/update-python-libraries

@@ -1,243 +0,0 @@
-#! /usr/bin/env nix-shell
-#! nix-shell -i python3 -p 'python3.withPackages(ps: with ps; [ requests toolz ])'
-
-"""
-Update a Python package expression by passing in the `.nix` file, or the directory containing it.
-You can pass in multiple files or paths.
-
-You'll likely want to use
-``
-  $ ./update-python-libraries ../../pkgs/development/python-modules/*
-``
-to update all libraries in that folder.
-"""
-
-import argparse
-import logging
-import os
-import re
-import requests
-import toolz
-
-INDEX = "https://pypi.io/pypi"
-"""url of PyPI"""
-
-EXTENSIONS = ['tar.gz', 'tar.bz2', 'tar', 'zip', '.whl']
-"""Permitted file extensions. These are evaluated from left to right and the first occurance is returned."""
-
-import logging
-logging.basicConfig(level=logging.INFO)
-
-
-def _get_values(attribute, text):
-    """Match attribute in text and return all matches.
-
-    :returns: List of matches.
-    """
-    regex = '{}\s+=\s+"(.*)";'.format(attribute)
-    regex = re.compile(regex)
-    values = regex.findall(text)
-    return values
-
-def _get_unique_value(attribute, text):
-    """Match attribute in text and return unique match.
-
-    :returns: Single match.
-    """
-    values = _get_values(attribute, text)
-    n = len(values)
-    if n > 1:
-        raise ValueError("found too many values for {}".format(attribute))
-    elif n == 1:
-        return values[0]
-    else:
-        raise ValueError("no value found for {}".format(attribute))
-
-def _get_line_and_value(attribute, text):
-    """Match attribute in text. Return the line and the value of the attribute."""
-    regex = '({}\s+=\s+"(.*)";)'.format(attribute)
-    regex = re.compile(regex)
-    value = regex.findall(text)
-    n = len(value)
-    if n > 1:
-        raise ValueError("found too many values for {}".format(attribute))
-    elif n == 1:
-        return value[0]
-    else:
-        raise ValueError("no value found for {}".format(attribute))
-
-
-def _replace_value(attribute, value, text):
-    """Search and replace value of attribute in text."""
-    old_line, old_value = _get_line_and_value(attribute, text)
-    new_line = old_line.replace(old_value, value)
-    new_text = text.replace(old_line, new_line)
-    return new_text
-
-def _fetch_page(url):
-    r = requests.get(url)
-    if r.status_code == requests.codes.ok:
-        return r.json()
-    else:
-        raise ValueError("request for {} failed".format(url))
-
-def _get_latest_version_pypi(package, extension):
-    """Get latest version and hash from PyPI."""
-    url = "{}/{}/json".format(INDEX, package)
-    json = _fetch_page(url)
-
-    version = json['info']['version']
-    for release in json['releases'][version]:
-        if release['filename'].endswith(extension):
-            # TODO: In case of wheel we need to do further checks!
-            sha256 = release['digests']['sha256']
-            break
-    else:
-        sha256 = None
-    return version, sha256
-
-
-def _get_latest_version_github(package, extension):
-    raise ValueError("updating from GitHub is not yet supported.")
-
-
-FETCHERS = {
-    'fetchFromGitHub'   :   _get_latest_version_github,
-    'fetchPypi'         :   _get_latest_version_pypi,
-    'fetchurl'          :   _get_latest_version_pypi,
-}
-
-
-DEFAULT_SETUPTOOLS_EXTENSION = 'tar.gz'
-
-
-FORMATS = {
-    'setuptools'        :   DEFAULT_SETUPTOOLS_EXTENSION,
-    'wheel'             :   'whl'
-}
-
-def _determine_fetcher(text):
-    # Count occurences of fetchers.
-    nfetchers = sum(text.count('src = {}'.format(fetcher)) for fetcher in FETCHERS.keys())
-    if nfetchers == 0:
-        raise ValueError("no fetcher.")
-    elif nfetchers > 1:
-        raise ValueError("multiple fetchers.")
-    else:
-        # Then we check which fetcher to use.
-        for fetcher in FETCHERS.keys():
-            if 'src = {}'.format(fetcher) in text:
-                return fetcher
-
-
-def _determine_extension(text, fetcher):
-    """Determine what extension is used in the expression.
-
-    If we use:
-    - fetchPypi, we check if format is specified.
-    - fetchurl, we determine the extension from the url.
-    - fetchFromGitHub we simply use `.tar.gz`.
-    """
-    if fetcher == 'fetchPypi':
-        try:
-            format = _get_unique_value('format', text)
-        except ValueError as e:
-            format = None   # format was not given
-
-        try:
-            extension = _get_unique_value('extension', text)
-        except ValueError as e:
-            extension = None    # extension was not given
-
-        if extension is None:
-            if format is None:
-                format = 'setuptools'
-            extension = FORMATS[format]
-
-    elif fetcher == 'fetchurl':
-        url = _get_unique_value('url', text)
-        extension = os.path.splitext(url)[1]
-        if 'pypi' not in url:
-            raise ValueError('url does not point to PyPI.')
-
-    elif fetcher == 'fetchFromGitHub':
-        raise ValueError('updating from GitHub is not yet implemented.')
-
-    return extension
-
-
-def _update_package(path):
-
-
-
-    # Read the expression
-    with open(path, 'r') as f:
-        text = f.read()
-
-    # Determine pname.
-    pname = _get_unique_value('pname', text)
-
-    # Determine version.
-    version = _get_unique_value('version', text)
-
-    # First we check how many fetchers are mentioned.
-    fetcher = _determine_fetcher(text)
-
-    extension = _determine_extension(text, fetcher)
-
-    new_version, new_sha256 = _get_latest_version_pypi(pname, extension)
-
-    if new_version == version:
-        logging.info("Path {}: no update available for {}.".format(path, pname))
-        return False
-    if not new_sha256:
-        raise ValueError("no file available for {}.".format(pname))
-
-    text = _replace_value('version', new_version, text)
-    text = _replace_value('sha256', new_sha256, text)
-
-    with open(path, 'w') as f:
-        f.write(text)
-
-        logging.info("Path {}: updated {} from {} to {}".format(path, pname, version, new_version))
-
-    return True
-
-
-def _update(path):
-
-    # We need to read and modify a Nix expression.
-    if os.path.isdir(path):
-        path = os.path.join(path, 'default.nix')
-
-    # If a default.nix does not exist, we quit.
-    if not os.path.isfile(path):
-        logging.info("Path {}: does not exist.".format(path))
-        return False
-
-    # If file is not a Nix expression, we quit.
-    if not path.endswith(".nix"):
-        logging.info("Path {}: does not end with `.nix`.".format(path))
-        return False
-
-    try:
-        return _update_package(path)
-    except ValueError as e:
-        logging.warning("Path {}: {}".format(path, e))
-        return False
-
-def main():
-
-    parser = argparse.ArgumentParser()
-    parser.add_argument('package', type=str, nargs='+')
-
-    args = parser.parse_args()
-
-    packages = map(os.path.abspath, args.package)
-
-    count = list(map(_update, packages))
-
-    logging.info("{} package(s) updated".format(sum(count)))
-
-if __name__ == '__main__':
-    main()

nixos/default.nix

@@ -37,4 +37,7 @@ in
   vm = vmConfig.system.build.vm;
 
   vmWithBootLoader = vmWithBootLoaderConfig.system.build.vm;
+
+  # The following are used by nixos-rebuild.
+  nixFallback = pkgs.nixUnstable.out;
 }

nixos/doc/manual/administration/imperative-containers.xml

@@ -29,10 +29,8 @@ line. For instance, to create a container that has
 <literal>root</literal>:
 
 <screen>
-# nixos-container create foo --config '
-  services.openssh.enable = true;
-  users.extraUsers.root.openssh.authorizedKeys.keys = ["ssh-dss AAAAB3N…"];
-'
+# nixos-container create foo --config 'services.openssh.enable = true; \
+  users.extraUsers.root.openssh.authorizedKeys.keys = ["ssh-dss AAAAB3N…"];'
 </screen>
 
 </para>
@@ -57,7 +55,7 @@ Thus, if something went wrong, you can get status info using
 
 </para>
 
-<para>If the container has started successfully, you can log in as
+<para>If the container has started succesfully, you can log in as
 root using the <command>root-login</command> operation:
 
 <screen>
@@ -99,11 +97,8 @@ This will build and activate the new configuration. You can also
 specify a new configuration on the command line:
 
 <screen>
-# nixos-container update foo --config '
-  services.httpd.enable = true;
-  services.httpd.adminAddr = "foo@example.org";
-  networking.firewall.allowedTCPPorts = [ 80 ];
-'
+# nixos-container update foo --config 'services.httpd.enable = true; \
+  services.httpd.adminAddr = "foo@example.org";'
 
 # curl http://$(nixos-container show-ip foo)/
 &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">…

nixos/doc/manual/configuration/file-systems.xml

@@ -35,12 +35,6 @@ or <literal>ext4</literal>, then it’s best to specify
 <option>fsType</option> to ensure that the kernel module is
 available.</para>
 
-<note><para>System startup will fail if any of the filesystems fails to mount,
-dropping you to the emergency shell.
-You can make a mount asynchronous and non-critical by adding
-<literal>options = [ "nofail" ];</literal>.
-</para></note>
-
 <xi:include href="luks-file-systems.xml" />
 
 </chapter>

nixos/doc/manual/configuration/modularity.xml

@@ -37,7 +37,7 @@ latter might look like this:
 
 { services.xserver.enable = true;
   services.xserver.displayManager.sddm.enable = true;
-  services.xserver.desktopManager.plasma5.enable = true;
+  services.xserver.desktopManager.kde5.enable = true;
 }
 </programlisting>
 

nixos/doc/manual/configuration/x-windows.xml

@@ -25,7 +25,7 @@ Otherwise, you can only log into a plain undecorated
 <command>xterm</command> window.  Thus you should pick one or more of
 the following lines:
 <programlisting>
-services.xserver.desktopManager.plasma5.enable = true;
+services.xserver.desktopManager.kde5.enable = true;
 services.xserver.desktopManager.xfce.enable = true;
 services.xserver.desktopManager.gnome3.enable = true;
 services.xserver.windowManager.xmonad.enable = true;
@@ -45,13 +45,6 @@ services.xserver.displayManager.lightdm.enable = true;
 </programlisting>
 </para>
 
-<para>You can set the keyboard layout (and optionally the layout variant):
-<programlisting>
-services.xserver.layout = "de";
-services.xserver.xkbVariant = "neo";
-</programlisting>
-</para>
-
 <para>The X server is started automatically at boot time.  If you
 don’t want this to happen, you can set:
 <programlisting>

nixos/doc/manual/configuration/xfce.xml

@@ -9,10 +9,10 @@
     <para>
         To enable the Xfce Desktop Environment, set
         <programlisting>
-services.xserver.desktopManager = {
-    xfce.enable = true;
-    default = "xfce";
-};
+            services.xserver.desktopManager = {
+                xfce.enable = true;
+                default = "xfce";
+            };
         </programlisting>
     </para>
 
@@ -20,13 +20,13 @@ services.xserver.desktopManager = {
         Optionally, <emphasis>compton</emphasis>
         can be enabled for nice graphical effects, some example settings:
         <programlisting>
-services.compton = {
-  enable          = true;
-  fade            = true;
-  inactiveOpacity = "0.9";
-  shadow          = true;
-  fadeDelta       = 4;
-};
+            services.compton = {
+              enable          = true;
+              fade            = true;
+              inactiveOpacity = "0.9";
+              shadow          = true;
+              fadeDelta       = 4;
+            };
         </programlisting>
     </para>
 
@@ -34,16 +34,16 @@ services.compton = {
         Some Xfce programs are not installed automatically.
         To install them manually (system wide), put them into your
         <literal>environment.systemPackages</literal>.
-    </para>
+	</para>
 
     <para>
-        NixOS’s default <emphasis>display manager</emphasis> is SLiM.
-        (DM is the program that provides a graphical login prompt
-         and manages the X server.)
-        You can, for example, select KDE’s
+		NixOS’s default <emphasis>display manager</emphasis>is SLiM.
+		(DM is the program that provides a graphical login prompt
+		 and manages the X server.)
+	   	You can, for example, select KDE’s
         <command>sddm</command> instead:
         <programlisting>
-services.xserver.displayManager.sddm.enable = true;
+            services.xserver.displayManager.sddm.enable = true;
         </programlisting>
     </para>
 
@@ -55,7 +55,7 @@ services.xserver.displayManager.sddm.enable = true;
             <emphasis>Thunar</emphasis>
             volume support, put
             <programlisting>
-services.xserver.desktopManager.xfce.enable = true;
+                services.xserver.desktopManager.xfce.enable = true;
             </programlisting>
             into your <emphasis>configuration.nix</emphasis>.
         </para>
@@ -84,10 +84,10 @@ services.xserver.desktopManager.xfce.enable = true;
             Thunar and/or the desktop takes time to show up.
 
             Thunar will spit out this kind of message on start
-            (look at <command>journalctl --user -b</command>).
+            (look at journalctl --user -b).
 
             <programlisting>
-Thunar:2410): GVFS-RemoteVolumeMonitor-WARNING **: remote volume monitor with dbus name org.gtk.Private.UDisks2VolumeMonitor is not supported
+                Thunar:2410): GVFS-RemoteVolumeMonitor-WARNING **: remote volume monitor with dbus name org.gtk.Private.UDisks2VolumeMonitor is not supported
             </programlisting>
 
             This is caused by some needed GNOME services not running.
@@ -95,7 +95,7 @@ Thunar:2410): GVFS-RemoteVolumeMonitor-WARNING **: remote volume monitor with db
             the Advanced tab of the Session and Startup settings panel.
             Alternatively, you can run this command to do the same thing.
             <programlisting>
-$ xfconf-query -c xfce4-session -p /compat/LaunchGNOME -s true
+                $ xfconf-query -c xfce4-session -p /compat/LaunchGNOME -s true
             </programlisting>
             A log-out and re-log will be needed for this to take effect.
         </para>

nixos/doc/manual/default.nix

@@ -65,7 +65,7 @@ let
       chmod -R u+w .
       ln -s ${modulesDoc} configuration/modules.xml
       ln -s ${optionsDocBook} options-db.xml
-      printf "%s" "${version}" > version
+      echo "${version}" > version
     '';
 
   toc = builtins.toFile "toc.xml"
@@ -94,43 +94,25 @@ let
     "--stringparam chunk.toc ${toc}"
   ];
 
-  manual-combined = runCommand "nixos-manual-combined"
-    { inherit sources;
-      buildInputs = [ libxml2 libxslt ];
-      meta.description = "The NixOS manual as plain docbook XML";
-    }
-    ''
-      ${copySources}
-
-      xmllint --xinclude --output ./manual-combined.xml ./manual.xml
-      xmllint --xinclude --noxincludenode \
-         --output ./man-pages-combined.xml ./man-pages.xml
-
-      xmllint --debug --noout --nonet \
-        --relaxng ${docbook5}/xml/rng/docbook/docbook.rng \
-        manual-combined.xml
-      xmllint --debug --noout --nonet \
-        --relaxng ${docbook5}/xml/rng/docbook/docbook.rng \
-        man-pages-combined.xml
-
-
-      mkdir $out
-      cp manual-combined.xml $out/
-      cp man-pages-combined.xml $out/
-    '';
-
   olinkDB = runCommand "manual-olinkdb"
     { inherit sources;
       buildInputs = [ libxml2 libxslt ];
     }
     ''
+      ${copySources}
+
       xsltproc \
         ${manualXsltprocOptions} \
         --stringparam collect.xref.targets only \
         --stringparam targets.filename "$out/manual.db" \
-        --nonet \
+        --nonet --xinclude \
         ${docbook5_xsl}/xml/xsl/docbook/xhtml/chunktoc.xsl \
-        ${manual-combined}/manual-combined.xml
+        ./manual.xml
+
+      # Check the validity of the man pages sources.
+      xmllint --noout --nonet --xinclude --noxincludenode \
+        --relaxng ${docbook5}/xml/rng/docbook/docbook.rng \
+        ./man-pages.xml
 
       cat > "$out/olinkdb.xml" <<EOF
       <?xml version="1.0" encoding="utf-8"?>
@@ -176,15 +158,21 @@ in rec {
       allowedReferences = ["out"];
     }
     ''
+      ${copySources}
+
+      # Check the validity of the manual sources.
+      xmllint --noout --nonet --xinclude --noxincludenode \
+        --relaxng ${docbook5}/xml/rng/docbook/docbook.rng \
+        manual.xml
+
       # Generate the HTML manual.
       dst=$out/share/doc/nixos
       mkdir -p $dst
       xsltproc \
         ${manualXsltprocOptions} \
         --stringparam target.database.document "${olinkDB}/olinkdb.xml" \
-        --nonet --output $dst/ \
-        ${docbook5_xsl}/xml/xsl/docbook/xhtml/chunktoc.xsl \
-        ${manual-combined}/manual-combined.xml
+        --nonet --xinclude --output $dst/ \
+        ${docbook5_xsl}/xml/xsl/docbook/xhtml/chunktoc.xsl ./manual.xml
 
       mkdir -p $dst/images/callouts
       cp ${docbook5_xsl}/xml/xsl/docbook/images/callouts/*.gif $dst/images/callouts/
@@ -202,6 +190,13 @@ in rec {
       buildInputs = [ libxml2 libxslt zip ];
     }
     ''
+      ${copySources}
+
+      # Check the validity of the manual sources.
+      xmllint --noout --nonet --xinclude --noxincludenode \
+        --relaxng ${docbook5}/xml/rng/docbook/docbook.rng \
+        manual.xml
+
       # Generate the epub manual.
       dst=$out/share/doc/nixos
 
@@ -209,11 +204,10 @@ in rec {
         ${manualXsltprocOptions} \
         --stringparam target.database.document "${olinkDB}/olinkdb.xml" \
         --nonet --xinclude --output $dst/epub/ \
-        ${docbook5_xsl}/xml/xsl/docbook/epub/docbook.xsl \
-        ${manual-combined}/manual-combined.xml
+        ${docbook5_xsl}/xml/xsl/docbook/epub/docbook.xsl ./manual.xml
 
       mkdir -p $dst/epub/OEBPS/images/callouts
-      cp -r ${docbook5_xsl}/xml/xsl/docbook/images/callouts/*.gif $dst/epub/OEBPS/images/callouts # */
+      cp -r ${docbook5_xsl}/xml/xsl/docbook/images/callouts/*.gif $dst/epub/OEBPS/images/callouts
       echo "application/epub+zip" > mimetype
       manual="$dst/nixos-manual.epub"
       zip -0Xq "$manual" mimetype
@@ -233,16 +227,23 @@ in rec {
       allowedReferences = ["out"];
     }
     ''
+      ${copySources}
+
+      # Check the validity of the man pages sources.
+      xmllint --noout --nonet --xinclude --noxincludenode \
+        --relaxng ${docbook5}/xml/rng/docbook/docbook.rng \
+        ./man-pages.xml
+
       # Generate manpages.
       mkdir -p $out/share/man
-      xsltproc --nonet \
+      xsltproc --nonet --xinclude \
         --param man.output.in.separate.dir 1 \
         --param man.output.base.dir "'$out/share/man/'" \
         --param man.endnotes.are.numbered 0 \
         --param man.break.after.slash 1 \
         --stringparam target.database.document "${olinkDB}/olinkdb.xml" \
         ${docbook5_xsl}/xml/xsl/docbook/manpages/docbook.xsl \
-        ${manual-combined}/man-pages-combined.xml
+        ./man-pages.xml
     '';
 
 }

nixos/doc/manual/development/building-nixos.xml

@@ -12,12 +12,12 @@ your <filename>configuration.nix</filename> to configure the system that
 would be installed on the CD.</para>
 
 <para>Default CD/DVD configurations are available
-inside <filename>nixos/modules/installer/cd-dvd</filename>.
+inside <filename>nixos/modules/installer/cd-dvd</filename>.  To build them
+you have to set <envar>NIXOS_CONFIG</envar> before
+running <command>nix-build</command> to build the ISO.
 
 <screen>
-$ git clone https://github.com/NixOS/nixpkgs.git
-$ cd nixpkgs/nixos
-$ nix-build -A config.system.build.isoImage -I nixos-config=modules/installer/cd-dvd/installation-cd-minimal.nix default.nix</screen>
+$ nix-build -A config.system.build.isoImage -I nixos-config=modules/installer/cd-dvd/installation-cd-minimal.nix</screen>
 
 </para>
 

nixos/doc/manual/development/option-declarations.xml

@@ -41,9 +41,8 @@ options = {
     <term><varname>default</varname></term>
     <listitem>
       <para>The default value used if no value is defined by any
-      module.  A default is not required; but if a default is not given,
-      then users of the module will have to define the value of the
-      option, otherwise an error will be thrown.</para>
+      module.  A default is not required; in that case, if the option
+      value is never used, an error will be thrown.</para>
     </listitem>
   </varlistentry>
 
@@ -96,7 +95,7 @@ options = {
   </itemizedlist>
   </para>
 
-  <para>Both approaches have problems.</para>
+  <para>Both approachs have problems.</para>
 
   <para>Making backends independent can quickly become hard to manage. For
     display managers, there can be only one enabled at a time, but the type

nixos/doc/manual/development/option-types.xml

@@ -68,7 +68,8 @@
 
  <section><title>Value Types</title>
 
-   <para>Value types are type that take a value parameter.</para>
+   <para>Value types are type that take a value parameter. The only value type 
+     in the library is <literal>enum</literal>.</para>
 
 <variablelist>
   <varlistentry>
@@ -140,17 +141,6 @@
           str</literal>. Multiple definitions cannot be 
         merged.</para></listitem>
   </varlistentry>
-  <varlistentry>
-    <term><varname>types.coercedTo</varname> <replaceable>from</replaceable>
-        <replaceable>f</replaceable> <replaceable>to</replaceable></term>
-    <listitem><para>Type <replaceable>to</replaceable> or type
-        <replaceable>from</replaceable> which will be coerced to
-	type <replaceable>to</replaceable> using function
-	<replaceable>f</replaceable> which takes an argument of type
-        <replaceable>from</replaceable> and return a value of type
-	<replaceable>to</replaceable>. Can be used to preserve backwards
-        compatibility of an option if its type was changed.</para></listitem>
-  </varlistentry>
 </variablelist>
 
 </section>
@@ -292,7 +282,7 @@ config.mod.two = { foo = 2; bar = "two"; };</screen></example>
 <screen>
 byte = mkOption {
   description = "An integer between 0 and 255.";
-  type = addCheck types.int (x: x &gt;= 0 &amp;&amp; x &lt;= 255);
+  type = addCheck (x: x &gt;= 0 &amp;&amp; x &lt;= 255) types.int;
 };</screen></example>
 
 <example xml:id='ex-extending-type-check-2'><title>Overriding a type 
@@ -396,7 +386,7 @@ code before creating a new type.</para>
     <listitem><para>For composed types that can take a submodule as type 
         parameter, this function can be used to substitute the parameter of a 
         submodule type. It takes a module as parameter and return the type with 
-        the submodule options substituted. It is usually defined as a type 
+        the submodule options substituted. It is usally defined as a type 
         function call with a recursive call to 
         <literal>substSubModules</literal>, e.g for a type 
         <literal>composedType</literal> that take an <literal>elemtype</literal> 

nixos/doc/manual/development/releases.xml

@@ -10,7 +10,7 @@
   <title>Release process</title>
 
   <para>
-    Going through an example of releasing NixOS 17.09:
+    Going through an example of releasing NixOS 15.09:
   </para>
 
   <section xml:id="one-month-before-the-beta">
@@ -18,13 +18,13 @@
     <itemizedlist spacing="compact">
       <listitem>
         <para>
-          Send an email to the nix-devel mailinglist as a warning about upcoming beta "feature freeze" in a month.
+          Send an email to nix-dev mailinglist as a warning about upcoming beta "feature freeze" in a month.
         </para>
       </listitem>
       <listitem>
         <para>
           Discuss with Eelco Dolstra and the community (via IRC, ML) about what will reach the deadline.
-          Any issue or Pull Request targeting the release should be included in the release milestone.
+          Any issue or Pull Request targeting the release should have assigned milestone.
         </para>
       </listitem>
     </itemizedlist>
@@ -32,6 +32,64 @@
   <section xml:id="at-beta-release-time">
     <title>At beta release time</title>
     <itemizedlist spacing="compact">
+      <listitem>
+        <para>
+          Rename <literal>rl-unstable.xml</literal> -&gt;
+          <literal>rl-1509.xml</literal>.
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          <literal>git tag -a -m &quot;Release 15.09-beta&quot; 15.09-beta &amp;&amp; git push --tags</literal>
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          From the master branch run <literal>git checkout -B release-15.09</literal>.
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://github.com/NixOS/nixos-org-configurations/pull/18">
+            Make sure channel is created at http://nixos.org/channels/.
+          </link>
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://github.com/NixOS/nixpkgs/settings/branches">
+            Lock the branch on github (so developers can’t force push)
+          </link>
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://github.com/NixOS/nixpkgs/compare/bdf161ed8d21...6b63c4616790">bump
+          <literal>system.defaultChannel</literal> attribute in
+          <literal>nixos/modules/misc/version.nix</literal></link>
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://github.com/NixOS/nixpkgs/commit/d6b08acd1ccac0d9d502c4b635e00b04d3387f06">update
+          <literal>versionSuffix</literal> in
+          <literal>nixos/release.nix</literal></link>, use
+          <literal>git log --format=%an|wc -l</literal> to get commit
+          count
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          <literal>echo -n &quot;16.03&quot; &gt; .version</literal> in
+          master.
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://github.com/NixOS/nixpkgs/commit/b8a4095003e27659092892a4708bb3698231a842">pick
+          a new name for unstable branch.</link>
+        </para>
+      </listitem>
       <listitem>
         <para>
           <link xlink:href="https://github.com/NixOS/nixpkgs/issues/13559">Create
@@ -41,81 +99,26 @@
       </listitem>
       <listitem>
         <para>
-          <literal>git tag -a -s -m &quot;Release 17.09-beta&quot; 17.09-beta &amp;&amp; git push --tags</literal>
+          Use https://lwn.net/Vulnerabilities/ and 
+          <link xlink:href="https://github.com/NixOS/nixpkgs/search?utf8=%E2%9C%93&amp;q=vulnerabilities&amp;type=Issues">triage vulnerabilities in an issue</link>.
         </para>
       </listitem>
       <listitem>
         <para>
-          From the master branch run <literal>git checkout -B release-17.09</literal>.
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          <link xlink:href="https://github.com/NixOS/nixos-org-configurations/pull/18">
-            Make sure a channel is created at http://nixos.org/channels/.
-          </link>
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          <link xlink:href="https://github.com/NixOS/nixpkgs/settings/branches">
-            Let a GitHub nixpkgs admin lock the branch on github for you.
-            (so developers can’t force push)
-          </link>
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          <link xlink:href="https://github.com/NixOS/nixpkgs/compare/bdf161ed8d21...6b63c4616790">
-            Bump the <literal>system.defaultChannel</literal> attribute in
-            <literal>nixos/modules/misc/version.nix</literal>
-          </link>
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          <link xlink:href="https://github.com/NixOS/nixpkgs/commit/d6b08acd1ccac0d9d502c4b635e00b04d3387f06">
-            Update <literal>versionSuffix</literal> in
-          <literal>nixos/release.nix</literal></link>, use
-          <literal>git log --format=%an|wc -l</literal> to get the commit
-          count
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          <literal>echo -n &quot;18.03&quot; &gt; .version</literal> on
-          master.
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          <link xlink:href="https://github.com/NixOS/nixpkgs/commit/b8a4095003e27659092892a4708bb3698231a842">
-            Pick a new name for the unstable branch.
-          </link>
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          Create a new release notes file for the upcoming release + 1, in this
-          case <literal>rl-1803.xml</literal>.
-        </para>
-      </listitem>
-      <listitem>
-        <para>
-          Create two Hydra jobsets: release-17.09 and release-17.09-small with <literal>stableBranch</literal> set to false.
+          Create two Hydra jobsets: release-15.09 and release-15.09-small with <literal>stableBranch</literal> set to false
         </para>
       </listitem>
       <listitem>
         <para>
           Edit changelog at
-          <literal>nixos/doc/manual/release-notes/rl-1709.xml</literal>
+          <literal>nixos/doc/manual/release-notes/rl-1509.xml</literal>
           (double check desktop versions are noted)
         </para>
         <itemizedlist spacing="compact">
           <listitem>
             <para>
               Get all new NixOS modules
-              <literal>git diff release-17.03..release-17.09 nixos/modules/module-list.nix|grep ^+</literal>
+              <literal>git diff release-14.12..release-15.09 nixos/modules/module-list.nix|grep ^+</literal>
             </para>
           </listitem>
           <listitem>
@@ -127,25 +130,9 @@
       </listitem>
     </itemizedlist>
   </section>
-  <section xml:id="during-beta">
-    <title>During Beta</title>
-    <itemizedlist spacing="compact">
-      <listitem>
-        <para>
-          Monitor the master branch for bugfixes and minor updates
-          and cherry-pick them to the release branch.
-        </para>
-      </listitem>
-    </itemizedlist>
-  </section>
   <section xml:id="before-the-final-release">
     <title>Before the final release</title>
     <itemizedlist spacing="compact">
-      <listitem>
-        <para>
-          Re-check that the release notes are complete.
-        </para>
-      </listitem>
       <listitem>
         <para>
           Release Nix (currently only Eelco Dolstra can do that).

nixos/doc/manual/development/replace-modules.xml

@@ -1,75 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-        xmlns:xlink="http://www.w3.org/1999/xlink"
-        xmlns:xi="http://www.w3.org/2001/XInclude"
-        version="5.0"
-        xml:id="sec-replace-modules">
-
-<title>Replace Modules</title>
-
-<para>Modules that are imported can also be disabled.  The option
-  declarations and config implementation of a disabled module will be
-  ignored, allowing another to take it's place.  This can be used to
-  import a set of modules from another channel while keeping the rest
-  of the system on a stable release.</para>
-<para><literal>disabledModules</literal> is a top level attribute like
-  <literal>imports</literal>, <literal>options</literal> and
-  <literal>config</literal>.  It contains a list of modules that will
-  be disabled. This can either be the full path to the module or a
-  string with the filename relative to the modules path
-  (eg. &lt;nixpkgs/nixos/modules&gt; for nixos).
-  </para>
-
-<para>This example will replace the existing postgresql module with
-  the version defined in the nixos-unstable channel while keeping the
-  rest of the modules and packages from the original nixos channel.
-  This only overrides the module definition, this won't use postgresql
-  from nixos-unstable unless explicitly configured to do so.</para>
-
-<programlisting>
-{ config, lib, pkgs, ... }:
-
-{
-  disabledModules = [ "services/databases/postgresql.nix" ];
-
-  imports =
-    [ # Use postgresql service from nixos-unstable channel.
-      # sudo nix-channel --add http://nixos.org/channels/nixos-unstable nixos-unstable
-      &lt;nixos-unstable/nixos/modules/services/databases/postgresql.nix&gt;
-    ];
-
-  services.postgresql.enable = true;
-}
-</programlisting>
-
-<para>This example shows how to define a custom module as a
-  replacement for an existing module. Importing this module will
-  disable the original module without having to know it's
-  implementation details.</para>
-
-<programlisting>
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-  cfg = config.programs.man;
-in
-
-{
-  disabledModules = [ "services/programs/man.nix" ];
-
-  options = {
-    programs.man.enable = mkOption {
-      type = types.bool;
-      default = true;
-      description = "Whether to enable manual pages.";
-    };
-  };
-
-  config = mkIf cfg.enabled {
-    warnings = [ "disabled manpages for production deployments." ];
-  };
-}
-</programlisting>
-
-</section>

nixos/doc/manual/development/sources.xml

@@ -8,7 +8,7 @@
 
 <para>By default, NixOS’s <command>nixos-rebuild</command> command
 uses the NixOS and Nixpkgs sources provided by the
-<literal>nixos</literal> channel (kept in
+<literal>nixos-unstable</literal> channel (kept in
 <filename>/nix/var/nix/profiles/per-user/root/channels/nixos</filename>).
 To modify NixOS, however, you should check out the latest sources from
 Git.  This is as follows:
@@ -27,8 +27,8 @@ a subdirectory of the Nixpkgs repository.) The remote
 <literal>channels</literal> refers to a read-only repository that
 tracks the Nixpkgs/NixOS channels (see <xref linkend="sec-upgrading"/>
 for more information about channels). Thus, the Git branch
-<literal>channels/nixos-17.03</literal> will contain the latest built
-and tested version available in the <literal>nixos-17.03</literal>
+<literal>channels/nixos-14.12</literal> will contain the latest built
+and tested version available in the <literal>nixos-14.12</literal>
 channel.</para>
 
 <para>It’s often inconvenient to develop directly on the master
@@ -39,9 +39,9 @@ branch based on your current NixOS version:
 
 <screen>
 $ nixos-version
-17.09pre104379.6e0b727 (Hummingbird)
+14.04.273.ea1952b (Baboon)
 
-$ git checkout -b local 6e0b727
+$ git checkout -b local ea1952b
 </screen>
 
 Or, to base your local branch on the latest version available in a
@@ -49,17 +49,17 @@ NixOS channel:
 
 <screen>
 $ git remote update channels
-$ git checkout -b local channels/nixos-17.03
+$ git checkout -b local channels/nixos-14.12
 </screen>
 
-(Replace <literal>nixos-17.03</literal> with the name of the channel
+(Replace <literal>nixos-14.12</literal> with the name of the channel
 you want to use.) You can use <command>git merge</command> or
 <command>git rebase</command> to keep your local branch in sync with
 the channel, e.g.
 
 <screen>
 $ git remote update channels
-$ git merge channels/nixos-17.03
+$ git merge channels/nixos-14.12
 </screen>
 
 You can use <command>git cherry-pick</command> to copy commits from
@@ -87,11 +87,7 @@ $ ln -s <replaceable>/my/sources</replaceable>/nixpkgs ~/.nix-defexpr/nixpkgs
 
 You may want to delete the symlink
 <filename>~/.nix-defexpr/channels_root</filename> to prevent root’s
-NixOS channel from clashing with your own tree (this may break the
-command-not-found utility though). If you want to go back to the default
-state, you may just remove the <filename>~/.nix-defexpr</filename>
-directory completely, log out and log in again and it should have been
-recreated with a link to the root channels.</para>
+NixOS channel from clashing with your own tree.</para>
 
 <!-- FIXME: not sure what this means.
 <para>You should not pass the base directory

nixos/doc/manual/development/writing-modules.xml

@@ -179,6 +179,5 @@ in {
 <xi:include href="option-types.xml" />
 <xi:include href="option-def.xml" />
 <xi:include href="meta-attributes.xml" />
-<xi:include href="replace-modules.xml" />
 
 </chapter>

nixos/doc/manual/installation/installing-uefi.xml

@@ -26,8 +26,7 @@ changes:
     <literal>vfat</literal> filesystem.</para>
   </listitem>
   <listitem>
-    <para>Instead of <option>boot.loader.grub.device</option>,
-    you must set <option>boot.loader.systemd-boot.enable</option> to
+    <para>You must set <option>boot.loader.systemd-boot.enable</option> to
     <literal>true</literal>. <command>nixos-generate-config</command>
     should do this automatically for new configurations when booted in
     UEFI mode.</para>

nixos/doc/manual/installation/installing-usb.xml

@@ -11,9 +11,7 @@ a USB stick. You can use the <command>dd</command> utility to write the image:
 <command>dd if=<replaceable>path-to-image</replaceable>
 of=<replaceable>/dev/sdb</replaceable></command>. Be careful about specifying the
 correct drive; you can use the <command>lsblk</command> command to get a list of
-block devices. If you're on macOS you can run <command>diskutil list</command>
-to see the list of devices; the device you'll use for the USB must be ejected
-before writing the image.</para>
+block devices.</para>
 
 <para>The <command>dd</command> utility will write the image verbatim to the drive,
 making it the recommended option for both UEFI and non-UEFI installations. For
@@ -34,11 +32,6 @@ ISO, copy its contents verbatim to your drive, then either:
     in <link xlink:href="https://www.kernel.org/doc/Documentation/kernel-parameters.txt">
     the kernel documentation</link> for more details).</para>
   </listitem>
-  <listitem>
-    <para>If you want to load the contents of the ISO to ram after bootin
-    (So you can remove the stick after bootup) you can append the parameter
-    <literal>copytoram</literal>to the <literal>options</literal> field.</para>
-  </listitem>
 </itemizedlist>
 </para>
 

nixos/doc/manual/installation/installing-virtualbox-guest.xml

@@ -37,7 +37,15 @@
 </orderedlist>
 
 <para>
-  There are a few modifications you should make in configuration.nix.
+  There are a few modifications you should make in configuration.nix. Enable
+  the virtualbox guest service in the main block:
+</para>
+
+<programlisting>
+virtualisation.virtualbox.guest.enable = true;
+</programlisting>
+
+<para>
   Enable booting:
 </para>
 

nixos/doc/manual/installation/upgrading.xml

@@ -15,12 +15,12 @@ been built.  These channels are:
 <itemizedlist>
   <listitem>
     <para><emphasis>Stable channels</emphasis>, such as <literal
-    xlink:href="https://nixos.org/channels/nixos-17.03">nixos-17.03</literal>.
+    xlink:href="https://nixos.org/channels/nixos-14.12">nixos-14.12</literal>.
     These only get conservative bug fixes and package upgrades.  For
     instance, a channel update may cause the Linux kernel on your
-    system to be upgraded from 4.9.16 to 4.9.17 (a minor bug fix), but
-    not from 4.9.<replaceable>x</replaceable> to
-    4.11.<replaceable>x</replaceable> (a major change that has the
+    system to be upgraded from 3.4.66 to 3.4.67 (a minor bug fix), but
+    not from 3.4.<replaceable>x</replaceable> to
+    3.11.<replaceable>x</replaceable> (a major change that has the
     potential to break things).  Stable channels are generally
     maintained until the next stable branch is created.</para>
     <para></para>
@@ -34,7 +34,7 @@ been built.  These channels are:
   </listitem>
   <listitem>
     <para><emphasis>Small channels</emphasis>, such as <literal
-    xlink:href="https://nixos.org/channels/nixos-17.03-small">nixos-17.03-small</literal>
+    xlink:href="https://nixos.org/channels/nixos-14.12-small">nixos-14.12-small</literal>
     or <literal
     xlink:href="https://nixos.org/channels/nixos-unstable-small">nixos-unstable-small</literal>. These
     are identical to the stable and unstable channels described above,
@@ -55,8 +55,8 @@ appliances.)</para>
 
 <para>When you first install NixOS, you’re automatically subscribed to
 the NixOS channel that corresponds to your installation source.   For
-instance, if you installed from a 17.03 ISO, you will be subscribed to
-the <literal>nixos-17.03</literal> channel.  To see which NixOS
+instance, if you installed from a 14.12 ISO, you will be subscribed to
+the <literal>nixos-14.12</literal> channel.  To see which NixOS
 channel you’re subscribed to, run the following as root:
 
 <screen>
@@ -71,16 +71,16 @@ To switch to a different NixOS channel, do
 </screen>
 
 (Be sure to include the <literal>nixos</literal> parameter at the
-end.)  For instance, to use the NixOS 17.03 stable channel:
+end.)  For instance, to use the NixOS 14.12 stable channel:
 
 <screen>
-# nix-channel --add https://nixos.org/channels/nixos-17.03 nixos
+# nix-channel --add https://nixos.org/channels/nixos-14.12 nixos
 </screen>
 
 If you have a server, you may want to use the “small” channel instead:
 
 <screen>
-# nix-channel --add https://nixos.org/channels/nixos-17.03-small nixos
+# nix-channel --add https://nixos.org/channels/nixos-14.12-small nixos
 </screen>
 
 And if you want to live on the bleeding edge:
@@ -130,7 +130,7 @@ runs, see <command>systemctl list-timers</command>.)  You can also
 specify a channel explicitly, e.g.
 
 <programlisting>
-system.autoUpgrade.channel = https://nixos.org/channels/nixos-17.03;
+system.autoUpgrade.channel = https://nixos.org/channels/nixos-15.09;
 </programlisting>
 
 </para>

nixos/doc/manual/man-nixos-option.xml

@@ -17,16 +17,11 @@
 <refsynopsisdiv>
   <cmdsynopsis>
     <command>nixos-option</command>
-    <arg>
-      <option>-I</option>
-      <replaceable>path</replaceable>
-    </arg>
-    <arg><option>--verbose</option></arg>
-    <arg><option>--xml</option></arg>
-    <arg choice="plain"><replaceable>option.name</replaceable></arg>
+    <arg choice='plain'><replaceable>option.name</replaceable></arg>
   </cmdsynopsis>
 </refsynopsisdiv>
 
+
 <refsection><title>Description</title>
 
 <para>This command evaluates the configuration specified in
@@ -38,45 +33,6 @@ attributes contained in the attribute set.</para>
 
 </refsection>
 
-<refsection><title>Options</title>
-
-<para>This command accepts the following options:</para>
-
-<variablelist>
-
-  <varlistentry>
-    <term><option>-I</option> <replaceable>path</replaceable></term>
-    <listitem>
-      <para>
-        This option is passed to the underlying
-        <command>nix-instantiate</command> invocation.
-      </para>
-    </listitem>
-  </varlistentry>
-
-  <varlistentry>
-    <term><option>--verbose</option></term>
-    <listitem>
-      <para>
-        This option enables verbose mode, which currently is just
-        the Bash <command>set</command> <option>-x</option> debug mode.
-      </para>
-    </listitem>
-  </varlistentry>
-
-  <varlistentry>
-    <term><option>--xml</option></term>
-    <listitem>
-      <para>
-        This option causes the output to be rendered as XML.
-      </para>
-    </listitem>
-  </varlistentry>
-
-</variablelist>
-
-</refsection>
-
 <refsection><title>Environment</title>
 
 <variablelist>

nixos/doc/manual/manual.xml

@@ -18,7 +18,7 @@
 
     <para>If you encounter problems, please report them on the
     <literal
-    xlink:href="https://groups.google.com/forum/#!forum/nix-devel">nix-devel</literal>
+    xlink:href="http://lists.science.uu.nl/mailman/listinfo/nix-dev">nix-dev@lists.science.uu.nl</literal>
     mailing list or on the <link
     xlink:href="irc://irc.freenode.net/#nixos">
     <literal>#nixos</literal> channel on Freenode</link>.  Bugs should

nixos/doc/manual/release-notes/release-notes.xml

@@ -9,7 +9,6 @@
 <para>This section lists the release notes for each stable version of NixOS
 and current unstable revision.</para>
 
-<xi:include href="rl-1709.xml" />
 <xi:include href="rl-1703.xml" />
 <xi:include href="rl-1609.xml" />
 <xi:include href="rl-1603.xml" />

nixos/doc/manual/release-notes/rl-1509.xml

@@ -28,7 +28,7 @@ has the following highlights:</para>
     since version 0.0 as well as the most recent <link
     xlink:href="http://www.stackage.org/">Stackage Nightly</link>
     snapshot. The announcement <link
-    xlink:href="https://nixos.org/nix-dev/2015-September/018138.html">&quot;Full
+    xlink:href="http://lists.science.uu.nl/pipermail/nix-dev/2015-September/018138.html">&quot;Full
     Stackage Support in Nixpkgs&quot;</link> gives additional
     details.</para>
   </listitem>
@@ -342,7 +342,7 @@ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -iA haskellPackages.pandoc
 
 <listitem>
   <para>
-    Python 2.6 has been marked as broken (as it no longer receives
+    Python 2.6 has been marked as broken (as it no longer recieves
     security updates from upstream).
   </para>
 </listitem>

nixos/doc/manual/release-notes/rl-1603.xml

@@ -362,7 +362,7 @@ services.syncthing = {
   <listitem>
     <para>
       <literal>networking.firewall.allowPing</literal> is now enabled by
-      default. Users are encouraged to configure an appropriate rate limit for
+      default. Users are encourarged to configure an approiate rate limit for
       their machines using the Kernel interface at
       <filename>/proc/sys/net/ipv4/icmp_ratelimit</filename> and
       <filename>/proc/sys/net/ipv6/icmp/ratelimit</filename> or using the

nixos/doc/manual/release-notes/rl-1609.xml

@@ -78,13 +78,13 @@ following incompatible changes:</para>
     our package set it loosely based on the latest available LTS release, i.e.
     LTS 7.x at the time of this writing. New releases of NixOS and Nixpkgs will
     drop those old names entirely. <link
-    xlink:href="https://nixos.org/nix-dev/2016-June/020585.html">The
+    xlink:href="http://lists.science.uu.nl/pipermail/nix-dev/2016-June/020585.html">The
     motivation for this change</link> has been discussed at length on the
     <literal>nix-dev</literal> mailing list and in <link
     xlink:href="https://github.com/NixOS/nixpkgs/issues/14897">Github issue
     #14897</link>. Development strategies for Haskell hackers who want to rely
     on Nix and NixOS have been described in <link
-    xlink:href="https://nixos.org/nix-dev/2016-June/020642.html">another
+    xlink:href="http://lists.science.uu.nl/pipermail/nix-dev/2016-June/020642.html">another
     nix-dev article</link>.</para>
   </listitem>