From ed3ca23cb1e0badeed2bf099f0d2413d24f438f2 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Thu, 9 Jan 2014 10:57:30 +0100
Subject: [PATCH] happy-1.19.2: remove import of "Data.Monoid (<>)" from
 Setup.lhs to fix build with GHC 7.2.2

This patch works around <https://github.com/simonmar/happy/issues/16>.
---
 pkgs/development/tools/parsing/happy/1.19.2.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/tools/parsing/happy/1.19.2.nix b/pkgs/development/tools/parsing/happy/1.19.2.nix
index eaf027b591d..4173d6d6c11 100644
--- a/pkgs/development/tools/parsing/happy/1.19.2.nix
+++ b/pkgs/development/tools/parsing/happy/1.19.2.nix
@@ -8,6 +8,7 @@ cabal.mkDerivation (self: {
   isExecutable = true;
   buildDepends = [ mtl ];
   buildTools = [ perl ];
+  patchPhase = "sed -i -e '/^import Data.Monoid/d' Setup.lhs";
   meta = {
     homepage = "http://www.haskell.org/happy/";
     description = "Happy is a parser generator for Haskell";