From a840ff2029a43010991a3cb9b8fd8b77ebfe2854 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Mon, 14 Jul 2014 14:10:15 +0200
Subject: [PATCH] haskell-force-layout: jailbreak to fix build with recent
 versions of lens

---
 pkgs/development/libraries/haskell/force-layout/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/libraries/haskell/force-layout/default.nix b/pkgs/development/libraries/haskell/force-layout/default.nix
index 60f13692c829..99cd863b7c48 100644
--- a/pkgs/development/libraries/haskell/force-layout/default.nix
+++ b/pkgs/development/libraries/haskell/force-layout/default.nix
@@ -9,6 +9,7 @@ cabal.mkDerivation (self: {
   buildDepends = [
     dataDefaultClass lens vectorSpace vectorSpacePoints
   ];
+  jailbreak = true;
   meta = {
     description = "Simple force-directed layout";
     license = self.stdenv.lib.licenses.bsd3;