From b6d215aa79f796812f5809d0618a56e6e7003c62 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Fri, 22 Dec 2017 19:25:59 -0500
Subject: [PATCH] haskell generic-builder: Support installing internal libs.

Fixes #32980.
---
 pkgs/development/haskell-modules/generic-builder.nix | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 3182b4846c0f..b80c5df68aa0 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -317,8 +317,14 @@ stdenv.mkDerivation ({
       local packageConfFile="$packageConfDir/${pname}-${version}.conf"
       mkdir -p "$packageConfDir"
       ${setupCommand} register --gen-pkg-config=$packageConfFile
-      local pkgId=$( ${gnused}/bin/sed -n -e 's|^id: ||p' $packageConfFile )
-      mv $packageConfFile $packageConfDir/$pkgId.conf
+      if [ -d "$packageConfFile" ]; then
+        mv "$packageConfFile"/* "$packageConfDir"
+        rmdir "$packageConfFile"
+      fi
+      for packageConfFile in "$packageConfDir"/*; do
+        local pkgId=$( ${gnused}/bin/sed -n -e 's|^id: ||p' $packageConfFile )
+        mv $packageConfFile $packageConfDir/$pkgId.conf
+      done
     ''}
     ${optionalString isGhcjs ''
       for exeDir in "$out/bin/"*.jsexe; do