From c5cb8aab31a9b0bd3f48595e0e70f9ec91c2f068 Mon Sep 17 00:00:00 2001
From: Joel Taylor <me@joelt.io>
Date: Thu, 21 Aug 2014 16:42:52 -0700
Subject: [PATCH] build ghc with older binary where possible

---
 pkgs/top-level/haskell-defaults.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 93d8431b8d0..0d1ddc6cbfb 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -226,7 +226,7 @@
 
   packages_ghc783 =
     packages { ghcPath = ../development/compilers/ghc/7.8.3.nix;
-               ghcBinary = ghc783Binary;
+               ghcBinary = if stdenv.isDarwin then ghc783Binary else ghc742Binary;
                prefFun = ghc783Prefs;
              };