@@ -34,6 +34,7 @@ before_install:
3434 - sudo add-apt-repository -y ppa:hvr/ghc
3535 - sudo apt-get update
3636 - sudo apt-get install cabal-install-1.18 ghc-$GHCVER
37+ - sudo apt-get install happy-1.19.3
3738 - export PATH=/opt/ghc/$GHCVER/bin:/opt/happy/1.19.3/bin:$PATH
3839
3940install: