travis: install transformers

haskell · Jan 2, 2015 · c92cb6d · c92cb6d
1 parent 4a9c4e5
commit c92cb6d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -21,6 +21,10 @@ before_install:
  - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
  - cabal --version
 
+ # needed for older GHCs for transformers
+ - cabal update
+ - cabal install --only-dependencies
+
 install:
  - travis_retry cabal update