From f20b21ad1e0f3b164942d5d2de4a870b05fd08e5 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Tue, 6 Nov 2012 18:22:46 +0100
Subject: [PATCH] Fix haskell-testpack build.

Testpack won't build with recent versions of QuickCheck
---
 pkgs/top-level/haskell-packages.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 2de6a2b573f..663039b64ff 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1571,7 +1571,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   testFrameworkThPrime = callPackage ../development/libraries/haskell/test-framework-th-prime {};
 
-  testpack = callPackage ../development/libraries/haskell/testpack {};
+  testpack = callPackage ../development/libraries/haskell/testpack {
+    QuickCheck = self.QuickCheck_2_4_2;
+  };
 
   texmath = callPackage ../development/libraries/haskell/texmath {};