1 files changed, 24 insertions, 0 deletions
diff --git a/pkgs/test/haskell-shellFor/default.nix b/pkgs/test/haskell-shellFor/default.nix
new file mode 100644
index 00000000000..1b3de999d22
--- /dev/null
+++ b/pkgs/test/haskell-shellFor/default.nix
@@ -0,0 +1,24 @@
+{ stdenv, haskellPackages, cabal-install }:
+
+haskellPackages.shellFor {
+  packages = p: [ p.database-id-class p.constraints-extras ];
+  nativeBuildInputs = [ cabal-install ];
+  phases = [ "unpackPhase" "buildPhase" "installPhase" ];
+  unpackPhase = ''
+    sourceRoot=$(pwd)/scratch
+    mkdir -p "$sourceRoot"
+    cd "$sourceRoot"
+    tar -xf ${haskellPackages.database-id-class.src}
+    tar -xf ${haskellPackages.constraints-extras.src}
+    cp ${builtins.toFile "cabal.project" "packages: database-id-class* constraints-extras*"} cabal.project
+  '';
+  buildPhase = ''
+    export HOME=$(mktemp -d)
+    mkdir -p $HOME/.cabal
+    touch $HOME/.cabal/config
+    cabal v2-build --offline --verbose database-id-class constraints-extras --ghc-options="-O0 -j$NIX_BUILD_CORES"
+  '';
+  installPhase = ''
+    touch $out
+  '';
+}