From 64971e08cdc78b9eda59766012ae88d4ff8cddfa Mon Sep 17 00:00:00 2001
From: Kazu Yamamoto <kazu@iij.ad.jp>
Date: Thu, 3 Jul 2014 20:13:10 +0900
Subject: [PATCH] workaround for #277

---
 .travis.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.travis.yml b/.travis.yml
index 7ca0fcf..d80c2e0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,6 +25,7 @@ install:
 script:
   - cabal configure --enable-tests
   - cabal build
+  - ghc-pkg unregister transformers
   - cabal test
   - cabal check
   - cabal sdist