From c9887ca4894f70116f39489d6a368572c4f33632 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sat, 17 May 2014 11:47:42 +0200
Subject: [PATCH] cabal-install: use native Cabal version when compiling with
 GHC 7.9.x

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

diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 79d58e91e34..0c93774741a 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -16,9 +16,11 @@
 
   ghcHEADPrefs = self : super : super // {
     mtl = self.mtl_2_1_3_1;
+    cabalInstall_1_20_0_1 = super.cabalInstall_1_20_0_1.override { Cabal = null; };
   };
 
   ghc782Prefs = self : super : ghcHEADPrefs self super // {
+    cabalInstall_1_20_0_1 = super.cabalInstall_1_20_0_1.override { Cabal = self.Cabal_1_20_0_0; };
   };
 
   ghc763Prefs = self : super : ghc782Prefs self super // {