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-rw-r--r--pkgs/development/haskell-modules/generic-builder.nix3
1 files changed, 3 insertions, 0 deletions
diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index c68d84bdb8a5..80274f515c52 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -394,6 +394,9 @@ stdenv.mkDerivation ({
         local pkgId=$( ${gnused}/bin/sed -n -e 's|^id: ||p' $packageConfFile )
         mv $packageConfFile $packageConfDir/$pkgId.conf
       done
+
+      # delete confdir if there are no libraries
+      find $packageConfDir -maxdepth 0 -empty -delete;
     ''}
     ${optionalString isGhcjs ''
       for exeDir in "$out/bin/"*.jsexe; do