diff --git a/pkgs/development/compilers/clasp/clasp-pin-repos-commits.patch b/pkgs/development/compilers/clasp/clasp-pin-repos-commits.patch
index 433c44b7da30..203ad5951411 100644
--- a/pkgs/development/compilers/clasp/clasp-pin-repos-commits.patch
+++ b/pkgs/development/compilers/clasp/clasp-pin-repos-commits.patch
@@ -1,15 +1,19 @@
 diff --git a/repos.sexp b/repos.sexp
-index 2b2459655..ad346d8e5 100644
+index d31d4d62d..cd3238585 100644
 --- a/repos.sexp
 +++ b/repos.sexp
-@@ -7,15 +7,15 @@
+@@ -5,17 +5,17 @@
+ ;;;;   4. src/ - C/C++ dependencies for iclasp
+ ;;;;   5. extensions/ - extensions and their dependencies
  ((:name :ansi-test
-   :repository "https://gitlab.common-lisp.net/yitzchak/ansi-test"
+-  :repository "https://gitlab.common-lisp.net/yitzchak/ansi-test"
++  :repository "https://github.com/clasp-developers/ansi-test.git"
    :directory "dependencies/ansi-test/"
 -  :branch "add-expected-failures")
-+  :commit "346cf2eb1133942054df8ce2125ed7e999b6d82b")
++  :commit "33ae7c1ddd3e814bbe6f55b9e7a6a92b39404664")
   (:name :cl-bench
-   :repository "https://gitlab.common-lisp.net/ansi-test/cl-bench.git"
+-  :repository "https://gitlab.common-lisp.net/ansi-test/cl-bench.git"
++  :repository "https://github.com/clasp-developers/cl-bench.git"
    :directory "dependencies/cl-bench/"
 -  :branch "master")
 +  :commit "7d184b4ef2a6272f0e3de88f6c243edb20f7071a")
@@ -21,7 +25,7 @@ index 2b2459655..ad346d8e5 100644
   (:name :quicklisp-client
    :repository "https://github.com/quicklisp/quicklisp-client.git"
    :directory "dependencies/quicklisp-client/"
-@@ -23,15 +23,15 @@
+@@ -23,21 +23,21 @@
   (:name :shasht
    :repository "https://github.com/yitzchak/shasht.git"
    :directory "dependencies/shasht/"
@@ -40,6 +44,13 @@ index 2b2459655..ad346d8e5 100644
   (:name :acclimation
    :repository "https://github.com/robert-strandh/Acclimation.git"
    :directory "src/lisp/kernel/contrib/Acclimation/"
+   :commit "dd15c86b0866fc5d8b474be0da15c58a3c04c45c")
+  (:name :alexandria
+-  :repository "https://gitlab.common-lisp.net/alexandria/alexandria.git"
++  :repository "https://github.com/clasp-developers/alexandria.git"
+   :directory "src/lisp/kernel/contrib/alexandria/"
+   :commit "v1.4")
+  (:name :anaphora
 @@ -128,7 +128,7 @@
   (:name :lparallel
    :repository "https://github.com/yitzchak/lparallel.git"
@@ -49,12 +60,31 @@ index 2b2459655..ad346d8e5 100644
    :extension :cando)
   (:name :parser.common-rules
    :repository "https://github.com/scymtym/parser.common-rules.git"
-@@ -152,7 +152,7 @@
+@@ -150,9 +150,9 @@
+   :commit "87a447a8eaef9cf4fd1c16d407a49f9adaf8adad"
+   :extension :cando)
   (:name :trivial-features ; Needed both by the host and eclasp
-   :repository "https://github.com/yitzchak/trivial-features.git"
+-  :repository "https://github.com/yitzchak/trivial-features.git"
++  :repository "https://github.com/trivial-features/trivial-features.git"
    :directory "src/lisp/kernel/contrib/trivial-features/"
 -  :branch "asdf-feature")
-+  :commit "0008ef4f3376fb76f63c35ecee6573d0d0f98d57")
++  :commit "d249a62aaf022902398a7141ae17217251fc61db")
   (:name :trivial-garbage
    :repository "https://github.com/trivial-garbage/trivial-garbage.git"
    :directory "src/lisp/kernel/contrib/trivial-garbage/"
+@@ -176,7 +176,7 @@
+   :directory "src/lisp/kernel/contrib/usocket/"
+   :commit "7ad6582cc1ce9e7fa5931a10e73b7d2f2688fa81")
+  (:name :asdf
+-  :repository "https://gitlab.common-lisp.net/asdf/asdf.git"
++  :repository "https://github.com/clasp-developers/asdf.git"
+   :directory "src/lisp/modules/asdf/"
+   :commit "3.3.5")
+  (:name :mps
+@@ -205,4 +205,4 @@
+   :repository "https://github.com/seqan/seqan.git"
+   :directory "extensions/seqan-clasp/seqan/"
+   :commit "f5f658343c366c9c3d44ba358ffc9317e78a09ed"
+-  :extension :seqan-clasp))
+\ No newline at end of file
++  :extension :seqan-clasp))
diff --git a/pkgs/development/compilers/clasp/default.nix b/pkgs/development/compilers/clasp/default.nix
index a80f7c58aed6..c9389d655ce5 100644
--- a/pkgs/development/compilers/clasp/default.nix
+++ b/pkgs/development/compilers/clasp/default.nix
@@ -16,6 +16,23 @@
 let
   inherit (llvmPackages_15) stdenv llvm libclang;
 
+  # Gathered from https://github.com/clasp-developers/clasp/raw/2.2.0/repos.sexp
+  dependencies = import ./dependencies.nix {
+    inherit fetchFromGitHub;
+  };
+
+  # Shortened version of `_defaultUnpack`
+  unpackDependency = elem: ''
+    mkdir -p "source/${elem.directory}"
+    cp -pr --reflink=auto -- ${elem.src}/* "source/${elem.directory}"
+    chmod -R u+w -- "source/${elem.directory}"
+  '';
+in
+
+stdenv.mkDerivation {
+  pname = "clasp";
+  version = "2.2.0";
+
   src = fetchFromGitHub {
     owner = "clasp-developers";
     repo = "clasp";
@@ -23,57 +40,10 @@ let
     hash = "sha256-gvUqUb0dftW1miiBcAPJur0wOunox4y2SUYeeJpR9R4=";
   };
 
-  reposDirs = [
-    "dependencies"
-    "src/lisp/kernel/contrib"
-    "src/lisp/modules/asdf"
-    "src/mps"
-    "src/bdwgc"
-    "src/libatomic_ops"
+  patches = [
+    ./clasp-pin-repos-commits.patch
   ];
 
-  reposTarball = stdenv.mkDerivation {
-    pname = "clasp-repos";
-    version = "tarball";
-
-    inherit src;
-
-    patches = [ ./clasp-pin-repos-commits.patch ];
-
-    nativeBuildInputs = [
-      sbcl
-      git
-      cacert
-    ];
-
-    buildPhase = ''
-      export SOURCE_DATE_EPOCH=1
-      export ASDF_OUTPUT_TRANSLATIONS=$(pwd):$(pwd)/__fasls
-      sbcl --script koga --help
-      for x in {${lib.concatStringsSep "," reposDirs}}; do
-        find $x -type d -name .git -exec rm -rvf {} \; || true
-      done
-    '';
-
-    installPhase = ''
-      tar --owner=0 --group=0 --numeric-owner --format=gnu \
-        --sort=name --mtime="@$SOURCE_DATE_EPOCH" \
-        -czf $out ${lib.concatStringsSep " " reposDirs}
-    '';
-
-    outputHashMode = "flat";
-    outputHashAlgo = "sha256";
-    outputHash = "sha256-vgwThjn2h3nKnShtKoHgaPdH/FDHv28fLMQvKFEwG6o=";
-  };
-
-in
-
-stdenv.mkDerivation {
-  pname = "clasp";
-  version = "2.2.0";
-
-  inherit src;
-
   nativeBuildInputs = [
     sbcl
     git
@@ -88,10 +58,11 @@ stdenv.mkDerivation {
     libclang
   ];
 
+  postUnpack = lib.concatStringsSep "\n" (builtins.map unpackDependency dependencies);
+
   configurePhase = ''
     export SOURCE_DATE_EPOCH=1
     export ASDF_OUTPUT_TRANSLATIONS=$(pwd):$(pwd)/__fasls
-    tar xf ${reposTarball}
     sbcl --script koga \
       --skip-sync \
       --cc=$NIX_CC/bin/cc \
diff --git a/pkgs/development/compilers/clasp/dependencies.nix b/pkgs/development/compilers/clasp/dependencies.nix
new file mode 100644
index 000000000000..abcd0f17747d
--- /dev/null
+++ b/pkgs/development/compilers/clasp/dependencies.nix
@@ -0,0 +1,457 @@
+# Gathered from https://github.com/clasp-developers/clasp/raw/2.2.0/repos.sexp
+# Generated using https://gist.github.com/philiptaron/8ea1394b049c2ca975e4b03965d9ac00
+# and then light editing using Vim
+
+{ fetchFromGitHub }:
+
+[
+  {
+    directory = "dependencies/ansi-test/";
+    src = fetchFromGitHub {
+      owner = "clasp-developers";
+      repo = "ansi-test";
+      rev = "33ae7c1ddd3e814bbe6f55b9e7a6a92b39404664";
+      hash = "sha256-dGF7CScvfPNMRxQXJM4v6Vfc/VjdUXNz0yCjUOsYM3I=";
+    };
+  }
+
+  {
+    directory = "dependencies/cl-bench/";
+    src = fetchFromGitHub {
+      owner = "clasp-developers";
+      repo = "cl-bench";
+      rev = "7d184b4ef2a6272f0e3de88f6c243edb20f7071a";
+      hash = "sha256-7ZEIWNEj7gzYFMTqW7nnZgjNE1zoTAMeJHj547gRtPs=";
+    };
+  }
+
+  {
+    directory = "dependencies/cl-who/";
+    src = fetchFromGitHub {
+      owner = "edicl";
+      repo = "cl-who";
+      rev = "07dafe9b351c32326ce20b5804e798f10d4f273d";
+      hash = "sha256-5T762W3qetAjXtHP77ko6YZR6w5bQ04XM6QZPELQu+U=";
+    };
+  }
+
+  {
+    directory = "dependencies/quicklisp-client/";
+    src = fetchFromGitHub {
+      owner = "quicklisp";
+      repo = "quicklisp-client";
+      rev = "8b63e00b3a2b3f96e24c113d7601dd03a128ce94";
+      hash = "sha256-1HLVPhl8aBaeG8dRLxBh0j0X/0wqFeNYK1CEfiELToA=";
+    };
+  }
+
+  {
+    directory = "dependencies/shasht/";
+    src = fetchFromGitHub {
+      owner = "yitzchak";
+      repo = "shasht";
+      rev = "f38e866990c6b5381a854d63f7ea0227c87c2f6d";
+      hash = "sha256-Ki5JNevMvVZoUz3tP6cv7qA4xDLzjd2MXmf4x9ew5bw=";
+    };
+  }
+
+  {
+    directory = "dependencies/trivial-do/";
+    src = fetchFromGitHub {
+      owner = "yitzchak";
+      repo = "trivial-do";
+      rev = "a19f93227cb80a6bec8846655ebcc7998020bd7e";
+      hash = "sha256-Tjd9VJan6pQpur292xtklvb28MDGGjq2+ub5T6o6FG8=";
+    };
+  }
+
+  {
+    directory = "dependencies/trivial-gray-streams/";
+    src = fetchFromGitHub {
+      owner = "trivial-gray-streams";
+      repo = "trivial-gray-streams";
+      rev = "2b3823edbc78a450db4891fd2b566ca0316a7876";
+      hash = "sha256-9vN74Gum7ihKSrCygC3hRLczNd15nNCWn5r60jjHN8I=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/Acclimation/";
+    src = fetchFromGitHub {
+      owner = "robert-strandh";
+      repo = "Acclimation";
+      rev = "dd15c86b0866fc5d8b474be0da15c58a3c04c45c";
+      hash = "sha256-AuoVdv/MU73A8X+GsxyG0K+xgzCKLQfbpu79oTERgmI=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/alexandria/";
+    src = fetchFromGitHub {
+      owner = "clasp-developers";
+      repo = "alexandria";
+      rev = "49e82add16cb9f1ffa72c77cd687271247181ff3";
+      hash = "sha256-1Hzxt65dZvgOFIljjjlSGgKYkj+YBLwJCACi5DZsKmQ=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/anaphora/";
+    src = fetchFromGitHub {
+      owner = "spwhitton";
+      repo = "anaphora";
+      rev = "bcf0f7485eec39415be1b2ec6ca31cf04a8ab5c5";
+      hash = "sha256-CzApbUmdDmD+BWPcFGJN0rdZu991354EdTDPn8FSRbc=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/architecture.builder-protocol/";
+    src = fetchFromGitHub {
+      owner = "scymtym";
+      repo = "architecture.builder-protocol";
+      rev = "0c1a9ebf9ab14e699c2b9c85fc20265b8c5364dd";
+      hash = "sha256-AdZeI4UCMnmuYpmSaWqIt+egdkNN3kzEn/zOqIBTnww=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/array-utils/";
+    src = fetchFromGitHub {
+      owner = "Shinmera";
+      repo = "array-utils";
+      rev = "5acd90fa3d9703cea33e3825334b256d7947632f";
+      hash = "sha256-Br3H39F+hqYnTgYtVezuRhwRQJwJlxohu+M033sYPOI=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/babel/";
+    src = fetchFromGitHub {
+      owner = "cl-babel";
+      repo = "babel";
+      rev = "f892d0587c7f3a1e6c0899425921b48008c29ee3";
+      hash = "sha256-U2E8u3ZWgH9eG4SV/t9CE1dUpcthuQMXgno/W1Ow2RE=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/bordeaux-threads/";
+    src = fetchFromGitHub {
+      owner = "sionescu";
+      repo = "bordeaux-threads";
+      rev = "3d25cd01176f7c9215ebc792c78313cb99ff02f9";
+      hash = "sha256-KoOaIKQZaZgEbtM6PGVwQn/xg+/slt+uloR4EaMlBeg=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/cffi/";
+    src = fetchFromGitHub {
+      owner = "cffi";
+      repo = "cffi";
+      rev = "9c912e7b89eb09dd347d3ebae16e4dc5f53e5717";
+      hash = "sha256-umt0HmX7M3SZM2VSrxqxUmNt9heTG/Ulwzphs2NRYTs=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/cl-markup/";
+    src = fetchFromGitHub {
+      owner = "arielnetworks";
+      repo = "cl-markup";
+      rev = "e0eb7debf4bdff98d1f49d0f811321a6a637b390";
+      hash = "sha256-50LZDaNfXhOZ6KoTmXClo5Bo2D9q1zbdCLSFkwqZhoI=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/cl-ppcre/";
+    src = fetchFromGitHub {
+      owner = "edicl";
+      repo = "cl-ppcre";
+      rev = "b4056c5aecd9304e80abced0ef9c89cd66ecfb5e";
+      hash = "sha256-6xeiSeYVwzAaisLQP/Bjqlc/Rhw8JMy0FT93hDQi5Y8=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/cl-svg/";
+    src = fetchFromGitHub {
+      owner = "wmannis";
+      repo = "cl-svg";
+      rev = "1e988ebd2d6e2ee7be4744208828ef1b59e5dcdc";
+      hash = "sha256-nwOvHGK0wIOZxAnZ68xyOhchAp8CBl/wsfRI42v8NYc=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/Cleavir/";
+    src = fetchFromGitHub {
+      owner = "s-expressionists";
+      repo = "Cleavir";
+      rev = "a73d313735447c63b4b11b6f8984f9b1e3e74ec9";
+      hash = "sha256-VQ8sB5W7JYnVsvfx2j7d2LQcECst79MCIW9QSuwm8GA=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/closer-mop/";
+    src = fetchFromGitHub {
+      owner = "pcostanza";
+      repo = "closer-mop";
+      rev = "d4d1c7aa6aba9b4ac8b7bb78ff4902a52126633f";
+      hash = "sha256-bHBYMBz45EOY727d4BWP75gRV4nzRAWxAlivPRzYrKo=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/Concrete-Syntax-Tree/";
+    src = fetchFromGitHub {
+      owner = "s-expressionists";
+      repo = "Concrete-Syntax-Tree";
+      rev = "4f01430c34f163356f3a2cfbf0a8a6963ff0e5ac";
+      hash = "sha256-0XfLkihztWUhqu7DrFiuwcEx/x+EILEivPfsHb5aMZk=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/documentation-utils/";
+    src = fetchFromGitHub {
+      owner = "Shinmera";
+      repo = "documentation-utils";
+      rev = "98630dd5f7e36ae057fa09da3523f42ccb5d1f55";
+      hash = "sha256-uMUyzymyS19ODiUjQbE/iJV7HFeVjB45gbnWqfGEGCU=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/Eclector/";
+    src = fetchFromGitHub {
+      owner = "s-expressionists";
+      repo = "Eclector";
+      rev = "dddb4d8af3eae78017baae7fb9b99e73d2a56e6b";
+      hash = "sha256-OrkWEI5HGlmejH9gg7OwJz2QXgAgE3kDHwen5yzhKgM=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/esrap/";
+    src = fetchFromGitHub {
+      owner = "scymtym";
+      repo = "esrap";
+      rev = "7588b430ad7c52f91a119b4b1c9a549d584b7064";
+      hash = "sha256-C0GiTyRna9BMIMy1/XdMZAkhjpLaoAEF1+ps97xQyMY=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/global-vars/";
+    src = fetchFromGitHub {
+      owner = "lmj";
+      repo = "global-vars";
+      rev = "c749f32c9b606a1457daa47d59630708ac0c266e";
+      hash = "sha256-bXxeNNnFsGbgP/any8rR3xBvHE9Rb4foVfrdQRHroxo=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/let-plus/";
+    src = fetchFromGitHub {
+      owner = "sharplispers";
+      repo = "let-plus";
+      rev = "455e657e077235829b197f7ccafd596fcda69e30";
+      hash = "sha256-SyZRx9cyuEN/h4t877TOWw35caQqMf2zSGZ9Qg22gAE=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/cl-netcdf/";
+    src = fetchFromGitHub {
+      owner = "clasp-developers";
+      repo = "cl-netcdf";
+      rev = "593c6c47b784ec02e67580aa12a7775ed6260200";
+      hash = "sha256-3VCTSsIbk0GovCM+rWPZj2QJdYq+UZksjfRd18UYY5s=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/lparallel/";
+    src = fetchFromGitHub {
+      owner = "yitzchak";
+      repo = "lparallel";
+      rev = "9c98bf629328b27a5a3fbb7a637afd1db439c00f";
+      hash = "sha256-sUM1WKXxZk7un64N66feXh21m7yzJsdcaWC3jIOd2W4=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/parser.common-rules/";
+    src = fetchFromGitHub {
+      owner = "scymtym";
+      repo = "parser.common-rules";
+      rev = "b7652db5e3f98440dce2226d67a50e8febdf7433";
+      hash = "sha256-ik+bteIjBN6MfMFiRBjn/nP7RBzv63QgoRKVi4F8Ho0=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/plump/";
+    src = fetchFromGitHub {
+      owner = "Shinmera";
+      repo = "plump";
+      rev = "d8ddda7514e12f35510a32399f18e2b26ec69ddc";
+      hash = "sha256-FjeZAWD81137lXWyN/RIr+L+anvwh/Glze497fcpHUY=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/split-sequence/";
+    src = fetchFromGitHub {
+      owner = "sharplispers";
+      repo = "split-sequence";
+      rev = "89a10b4d697f03eb32ade3c373c4fd69800a841a";
+      hash = "sha256-faF2EiQ+xXWHX9JlZ187xR2mWhdOYCpb4EZCPNoZ9uQ=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/static-vectors/";
+    src = fetchFromGitHub {
+      owner = "sionescu";
+      repo = "static-vectors";
+      rev = "87a447a8eaef9cf4fd1c16d407a49f9adaf8adad";
+      hash = "sha256-q4E+VPX/pOyuCdzJZ6CFEIiR58E6JIxJySROl/WcMyI=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/trivial-features/";
+    src = fetchFromGitHub {
+      owner = "trivial-features";
+      repo = "trivial-features";
+      rev = "d249a62aaf022902398a7141ae17217251fc61db";
+      hash = "sha256-g50OSfrMRH5hTRy077C1kCln2vz0Qeb1oq9qHh7zY2Q=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/trivial-garbage/";
+    src = fetchFromGitHub {
+      owner = "trivial-garbage";
+      repo = "trivial-garbage";
+      rev = "b3af9c0c25d4d4c271545f1420e5ea5d1c892427";
+      hash = "sha256-CCLZHHW3/0Id0uHxrbjf/WM3yC8netkcQ8p9Qtssvc4=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/trivial-http/";
+    src = fetchFromGitHub {
+      owner = "gwkkwg";
+      repo = "trivial-http";
+      rev = "ca45656587f36378305de1a4499c308acc7a03af";
+      hash = "sha256-0VKWHJYn1XcXVNHduxKiABe7xFUxj8M4/u92Usvq54o=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/trivial-indent/";
+    src = fetchFromGitHub {
+      owner = "Shinmera";
+      repo = "trivial-indent";
+      rev = "8d92e94756475d67fa1db2a9b5be77bc9c64d96c";
+      hash = "sha256-G+YCIB3bKN4RotJUjT/6bnivSBalseFRhIlwsEm5EUk=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/trivial-with-current-source-form/";
+    src = fetchFromGitHub {
+      owner = "scymtym";
+      repo = "trivial-with-current-source-form";
+      rev = "3898e09f8047ef89113df265574ae8de8afa31ac";
+      hash = "sha256-IKJOyJYqGBx0b6Oomddvb+2K6q4W508s3xnplleMJIQ=";
+    };
+  }
+
+  {
+    directory = "src/lisp/kernel/contrib/usocket/";
+    src = fetchFromGitHub {
+      owner = "usocket";
+      repo = "usocket";
+      rev = "7ad6582cc1ce9e7fa5931a10e73b7d2f2688fa81";
+      hash = "sha256-0HiItuc6fV70Rpk/5VevI1I0mGnY1JJvhnyPpx6r0uo=";
+    };
+  }
+
+  {
+    directory = "src/lisp/modules/asdf/";
+    src = fetchFromGitHub {
+      owner = "clasp-developers";
+      repo = "asdf";
+      rev = "97b279faf3cc11a5cfdd19b5325025cc8ec1e7bd";
+      hash = "sha256-4LhF+abor5NK4HgbGCYM5kSaH7TLISW5w5HXYOm4wqw=";
+    };
+  }
+
+  {
+    directory = "src/mps/";
+    src = fetchFromGitHub {
+      owner = "Ravenbrook";
+      repo = "mps";
+      rev = "b8a05a3846430bc36c8200f24d248c8293801503";
+      hash = "sha256-Zuc77cdap0xNYEqM8IkMQMUMY0f5QZ84uFmKgXjDXeA=";
+    };
+  }
+
+  {
+    directory = "src/bdwgc/";
+    src = fetchFromGitHub {
+      owner = "ivmai";
+      repo = "bdwgc";
+      rev = "036becee374b84fed5d56a6df3ae097b7cc0ff73";
+      hash = "sha256-WB1sFfVL6lWL+DEypg3chCJS/w0J4tPGi5tL1o3W73U=";
+    };
+  }
+
+  {
+    directory = "src/libatomic_ops/";
+    src = fetchFromGitHub {
+      owner = "ivmai";
+      repo = "libatomic_ops";
+      rev = "4b7d0b9036f9a645b03010dad1c7b7f86ea75772";
+      hash = "sha256-zThdbX2/l5/ZZVYobJf9KAd+IjIDIrk+08SUhTQs2gE=";
+    };
+  }
+
+  {
+    directory = "extensions/cando/";
+    src = fetchFromGitHub {
+      owner = "cando-developers";
+      repo = "cando";
+      rev = "a6934eddfce2ff1cb7131affce427ce652392f08";
+      hash = "sha256-AUmBLrk7lofJNagvI3KhPebvV8GkrDbBXrsAa3a1Bwo=";
+    };
+  }
+
+  {
+    directory = "extensions/seqan-clasp/";
+    src = fetchFromGitHub {
+      owner = "clasp-developers";
+      repo = "seqan-clasp";
+      rev = "5caa2e1e6028525276a6b6ba770fa6e334563d58";
+      hash = "sha256-xAvAd/kBr8n9SSw/trgWTqDWQLmpOp8+JX5L+JO2+Ls=";
+    };
+  }
+
+  {
+    directory = "extensions/seqan-clasp/seqan/";
+    src = fetchFromGitHub {
+      owner = "seqan";
+      repo = "seqan";
+      rev = "f5f658343c366c9c3d44ba358ffc9317e78a09ed";
+      hash = "sha256-AzZlONf7SNxCa9+SKQFC/rA6fx6rhWH96caZSmKnlsU=";
+    };
+  }
+]