From e69353aaf70db2f12cd3ceb177ac6dd7305cda80 Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Fri, 19 Nov 2021 18:29:50 +0100
Subject: [PATCH] haskellPackages.doctest_0_18_2: init at 0.18.2

Since hledger-lib 1.23 won't build with the latest doctest, there's
likely a change in behavior somewhere. 0.18.2 is then the closest
doctest to stackage's which works with GHC >= 9, so let's stick with it
for now.
---
 .../configuration-hackage2nix/main.yaml       |  1 +
 .../haskell-modules/hackage-packages.nix      | 30 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 7c106393dd9f..d59383e44b0a 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -133,6 +133,7 @@ extra-packages:
   - ghc-lib == 9.0.1.*                  # 2021-11-05: Need one GHC 9.0.1 compatible version
   - ghc-lib-parser == 9.0.1.*           # 2021-11-05: Need one GHC 9.0.1 compatible version
   - ghc-lib-parser-ex == 9.0.*          # 2021-11-05: Need one GHC 9.0.1 compatible version
+  - doctest == 0.18.*                   # 2021-11-19: closest to stackage version for GHC 9.*
 
 package-maintainers:
   abbradar:
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 4aa459e191b7..686c610186ca 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -80227,6 +80227,36 @@ self: {
        license = lib.licenses.mit;
      }) {};
 
+  "doctest_0_18_2" = callPackage
+    ({ mkDerivation, base, base-compat, code-page, deepseq, directory
+     , exceptions, filepath, ghc, ghc-paths, hspec, hspec-core, HUnit
+     , mockery, process, QuickCheck, setenv, silently, stringbuilder
+     , syb, transformers
+     }:
+     mkDerivation {
+       pname = "doctest";
+       version = "0.18.2";
+       sha256 = "0c48dpxa8i3q5xh2shd2p2xxhrsy7wdil6dg4mayr3lkk1dlwbfp";
+       isLibrary = true;
+       isExecutable = true;
+       libraryHaskellDepends = [
+         base base-compat code-page deepseq directory exceptions filepath
+         ghc ghc-paths process syb transformers
+       ];
+       executableHaskellDepends = [
+         base base-compat code-page deepseq directory exceptions filepath
+         ghc ghc-paths process syb transformers
+       ];
+       testHaskellDepends = [
+         base base-compat code-page deepseq directory exceptions filepath
+         ghc ghc-paths hspec hspec-core HUnit mockery process QuickCheck
+         setenv silently stringbuilder syb transformers
+       ];
+       description = "Test interactive Haskell examples";
+       license = lib.licenses.mit;
+       hydraPlatforms = lib.platforms.none;
+     }) {};
+
   "doctest_0_20_0" = callPackage
     ({ mkDerivation, base, base-compat, code-page, deepseq, directory
      , exceptions, filepath, ghc, ghc-paths, hspec, hspec-core