From 2b673eab3c3a11a91037f8c0ade3bcb6a12efd3c Mon Sep 17 00:00:00 2001
From: Gabor Greif <ggreif@gmail.com>
Date: Thu, 12 Jun 2014 12:26:26 +0200
Subject: [PATCH] Make it compilable with GHC HEAD (v7.9)

See ghc bug #8883 and related discussion http://www.haskell.org/pipermail/ghc-devs/2014-June/005180.html
---
 src/Physics/ForceLayout.hs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Physics/ForceLayout.hs b/src/Physics/ForceLayout.hs
index a3bc692..5acce08 100644
--- a/src/Physics/ForceLayout.hs
+++ b/src/Physics/ForceLayout.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE FlexibleContexts     #-}
 {-# LANGUAGE ScopedTypeVariables  #-}
 {-# LANGUAGE TemplateHaskell      #-}
+{-# LANGUAGE TypeFamilies         #-}
 {-# LANGUAGE UndecidableInstances #-}
 
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