travis.yml: install "happy" which is a dependency for haskell-src-exts

diff --git a/.travis.yml b/.travis.yml
index 5d11581d088e408569fdd779ced9c6bc3398b2ec..993167b9cf677d627c21ba269aa4231a50f301da 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,2 +1,6 @@
 language: haskell
 ghc: 7.8
+install:
+  # Happy needs to be updated for haskell-src: https://github.com/haskell-suite/haskell-src-exts/issues/64
+  - cabal install happy
+  - cabal install --only-dependencies --enable-tests
\ No newline at end of file