From d0250ad884bf66f635f23fe38dc114bb6e822d25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Domen=20Ko=C5=BEar?= <domen@dev.si>
Date: Fri, 16 Dec 2016 21:18:20 +0100
Subject: [PATCH] Haskell generic builder: enable parallel builds for GHC 8.0.2

This reverts https://github.com/NixOS/nixpkgs/pull/4554
---
 pkgs/development/haskell-modules/generic-builder.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 6c75c1f35507..f91bd474c6fd 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -114,6 +114,7 @@ let
     (optionalString (isGhcjs || versionOlder "7" ghc.version) (enableFeature enableStaticLibraries "library-vanilla"))
     (optionalString (isGhcjs || versionOlder "7.4" ghc.version) (enableFeature enableSharedExecutables "executable-dynamic"))
     (optionalString (isGhcjs || versionOlder "7" ghc.version) (enableFeature doCheck "tests"))
+    (optionalString (versionOlder "8.0.1" ghc.version) "--ghc-option=-j$NIX_BUILD_CORES")
   ] ++ optionals isGhcjs [
     "--with-hsc2hs=${nativeGhc}/bin/hsc2hs"
     "--ghcjs"