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haskell-modules/generic-builder.nix: use mktemp instead of TMPDIR

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Using $TMPDIR here is problematic because it is not always cleared at
the end of each build, for instance when using "nix-shell --run
genericBuild". This can cause confusing errors when a nix-shell build
is trying to pull in dependencies from a previous build since it tries
to use older package conf files.

To fix, we can just use mktemp which will guarantee us a clean
directory for each build. Should have no effect in nix-build, but will
fix a common issue with using generic-builder in nix-shell.
This commit is contained in:
Matthew Bauer 2022-05-05 12:01:23 -05:00
parent 35ddacd899
commit 91e4fa278e
1 changed files with 4 additions and 3 deletions
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7
pkgs/development/haskell-modules/generic-builder.nix
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@ -338,9 +338,10 @@ stdenv.mkDerivation ({
echo "Build with ${ghc}."
${optionalString (isLibrary && hyperlinkSource) "export PATH=${hscolour}/bin:$PATH"}
setupPackageConfDir="$TMPDIR/setup-package.conf.d"
builddir="$(mktemp -d)"
setupPackageConfDir="$builddir/setup-package.conf.d"
mkdir -p $setupPackageConfDir
packageConfDir="$TMPDIR/package.conf.d"
packageConfDir="$builddir/package.conf.d"
mkdir -p $packageConfDir
setupCompileFlags="${concatStringsSep " " setupCompileFlags}"
@ -418,7 +419,7 @@ stdenv.mkDerivation ({
done
echo setupCompileFlags: $setupCompileFlags
${nativeGhcCommand} $setupCompileFlags --make -o Setup -odir $TMPDIR -hidir $TMPDIR $i
${nativeGhcCommand} $setupCompileFlags --make -o Setup -odir $builddir -hidir $builddir $i
runHook postCompileBuildDriver
'';