From 6060a7483a28e556b0605f1fe2902f8ae3a0759b Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sat, 1 Nov 2014 16:45:35 +0100
Subject: [PATCH] haskell-diagrams-postscript: jailbreak to fix build with
 latest version of 'lens'

---
 pkgs/development/libraries/haskell/diagrams/postscript.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/libraries/haskell/diagrams/postscript.nix b/pkgs/development/libraries/haskell/diagrams/postscript.nix
index 557aae73db5..3d8656c5244 100644
--- a/pkgs/development/libraries/haskell/diagrams/postscript.nix
+++ b/pkgs/development/libraries/haskell/diagrams/postscript.nix
@@ -13,6 +13,7 @@ cabal.mkDerivation (self: {
     dataDefaultClass diagramsCore diagramsLib dlist filepath hashable
     lens monoidExtras mtl semigroups split vectorSpace
   ];
+  jailbreak = true;
   meta = {
     homepage = "http://projects.haskell.org/diagrams/";
     description = "Postscript backend for diagrams drawing EDSL";