From 07542d12eaf344c7e0c7b9e9735826eecba607c5 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Wed, 2 Sep 2015 16:24:06 +0200
Subject: [PATCH] hoogle: use $NIX_BUILD_CORES to determine the proper level of
 parallelism for database creation

---
 pkgs/development/haskell-modules/hoogle.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/haskell-modules/hoogle.nix b/pkgs/development/haskell-modules/hoogle.nix
index e2f6c289a80..14464ceca80 100644
--- a/pkgs/development/haskell-modules/hoogle.nix
+++ b/pkgs/development/haskell-modules/hoogle.nix
@@ -82,7 +82,7 @@ stdenv.mkDerivation {
     echo building hoogle database
     # FIXME: rehoo is marked as depricated on Hackage
     chmod 644 *.hoo *.txt
-    rehoo -j4 -c64 .
+    rehoo -j$NIX_BUILD_CORES -c64 .
 
     mv default.hoo .x
     rm -fr downloads *.dep *.txt *.hoo