From cc691d95f5c94e7402aa14511511603a13952566 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sat, 3 Aug 2013 10:32:39 +0200
Subject: [PATCH] haskell-lens: jailbreak to fix build with latest version of
 generic-deriving

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

diff --git a/pkgs/development/libraries/haskell/lens/default.nix b/pkgs/development/libraries/haskell/lens/default.nix
index 4531603214e..8bc221f1493 100644
--- a/pkgs/development/libraries/haskell/lens/default.nix
+++ b/pkgs/development/libraries/haskell/lens/default.nix
@@ -26,6 +26,9 @@ cabal.mkDerivation (self: {
     transformers unorderedContainers vector
   ];
   doCheck = false;
+  patchPhase = ''
+    sed -i -e 's|generic-deriving.*,|generic-deriving,|' lens.cabal
+  '';
   meta = {
     homepage = "http://github.com/ekmett/lens/";
     description = "Lenses, Folds and Traversals";