From 9537b2c8d24328e4257699e7ad0aa642525075b8 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sat, 9 Nov 2013 19:28:23 +0100
Subject: [PATCH] haskell-HList: update to version 0.2.3

---
 pkgs/development/libraries/haskell/HList/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/haskell/HList/default.nix b/pkgs/development/libraries/haskell/HList/default.nix
index 35b03f77dde6..df2bfcf1f798 100644
--- a/pkgs/development/libraries/haskell/HList/default.nix
+++ b/pkgs/development/libraries/haskell/HList/default.nix
@@ -1,9 +1,10 @@
-{ cabal }:
+{ cabal, diffutils }:
 
 cabal.mkDerivation (self: {
   pname = "HList";
   version = "0.2.3";
   sha256 = "1efbe0c2cb361ab0a9d864a09f9c58075132cb50094207260cb1363fe73c2908";
+  buildTools = [ diffutils ];
   meta = {
     description = "Heterogeneous lists";
     license = self.stdenv.lib.licenses.mit;