From 5fb3ac1d5bcca45245a3590b6361ba448e50f659 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Tue, 29 May 2012 21:25:52 +0000
Subject: [PATCH] haskell-happstack-data: patched to support current mtl and
 transformers

svn path=/nixpkgs/trunk/; revision=34287
---
 .../development/libraries/haskell/happstack/happstack-data.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/libraries/haskell/happstack/happstack-data.nix b/pkgs/development/libraries/haskell/happstack/happstack-data.nix
index bdf27495d82a..aa540e98bd5c 100644
--- a/pkgs/development/libraries/haskell/happstack/happstack-data.nix
+++ b/pkgs/development/libraries/haskell/happstack/happstack-data.nix
@@ -11,6 +11,9 @@ cabal.mkDerivation (self: {
   buildDepends = [
     binary mtl syb sybWithClass sybWithClassInstancesText text time
   ];
+  patchPhase = ''
+    sed -i -e 's|mtl >= 1.1 && < 2.1|mtl|' happstack-data.cabal
+  '';
   meta = {
     homepage = "http://happstack.com";
     description = "Happstack data manipulation libraries";