From 8fad2b0a9867c1d7b26da57975b89197d8283fa9 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Tue, 29 May 2012 21:26:09 +0000
Subject: [PATCH] haskell-happstack-util: patched to support current mtl and
 transformers

svn path=/nixpkgs/trunk/; revision=34288
---
 .../development/libraries/haskell/happstack/happstack-util.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/libraries/haskell/happstack/happstack-util.nix b/pkgs/development/libraries/haskell/happstack/happstack-util.nix
index f63d253864c6..b457ec6dc322 100644
--- a/pkgs/development/libraries/haskell/happstack/happstack-util.nix
+++ b/pkgs/development/libraries/haskell/happstack/happstack-util.nix
@@ -12,6 +12,9 @@ cabal.mkDerivation (self: {
     extensibleExceptions filepath hslogger mtl network parsec random
     time unixCompat
   ];
+  patchPhase = ''
+    sed -i -e 's|mtl >= 1.1 && < 2.1|mtl|' happstack-util.cabal
+  '';
   meta = {
     homepage = "http://happstack.com";
     description = "Web framework";