From 033a15841fca8615f10894b0befbf1ccce3ff735 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Sun, 5 May 2013 20:35:56 +0200
Subject: [PATCH] haskell-dual-tree: jailbreak to fix build with monoid-extras
 0.3.x

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

diff --git a/pkgs/development/libraries/haskell/dual-tree/default.nix b/pkgs/development/libraries/haskell/dual-tree/default.nix
index 54f1da653161..a41924dbcfcb 100644
--- a/pkgs/development/libraries/haskell/dual-tree/default.nix
+++ b/pkgs/development/libraries/haskell/dual-tree/default.nix
@@ -5,6 +5,7 @@ cabal.mkDerivation (self: {
   version = "0.1.0.2";
   sha256 = "0ys50m8yjksxi33qyk6ql4ldpdzb0fvxqvywi3y46xi16w5yrkb0";
   buildDepends = [ monoidExtras newtype semigroups ];
+  jailbreak = true;
   meta = {
     description = "Rose trees with cached and accumulating monoidal annotations";
     license = self.stdenv.lib.licenses.bsd3;