From 3277d89fcf7c762a7b3998e344fb2b1cd1aef1b1 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sun, 2 Oct 2011 20:13:54 +0000
Subject: [PATCH] haddock-2.4.2: added 'happy' build input

svn path=/nixpkgs/trunk/; revision=29571
---
 pkgs/development/tools/documentation/haddock/2.4.2.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/tools/documentation/haddock/2.4.2.nix b/pkgs/development/tools/documentation/haddock/2.4.2.nix
index 30b06ed280a..3abd66fe534 100644
--- a/pkgs/development/tools/documentation/haddock/2.4.2.nix
+++ b/pkgs/development/tools/documentation/haddock/2.4.2.nix
@@ -1,4 +1,4 @@
-{ cabal, alex, ghcPaths }:
+{ cabal, alex, ghcPaths, happy }:
 
 cabal.mkDerivation (self: {
   pname = "haddock";
@@ -7,7 +7,7 @@ cabal.mkDerivation (self: {
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ ghcPaths ];
-  buildTools = [ alex ];
+  buildTools = [ alex happy ];
   meta = {
     homepage = "http://www.haskell.org/haddock/";
     description = "A documentation-generation tool for Haskell libraries";