script:
- cabal configure --enable-tests
- cabal test -j2
matrix:
  include:
  - env: CABALVER=1.18 GHCVER=7.8.4
    addons:
      apt:
        sources:
        - hvr-ghc
        packages:
        - cabal-1.18
        - ghc-7.8.4
  - env: CABALVER=1.22 GHCVER=7.10.1
    addons:
      apt:
        sources:
        - hvr-ghc
        packages:
        - cabal-1.22
        - ghc-7.10.1
  - env: CABALVER=1.22 GHCVER=head
    addons:
      apt:
        sources:
        - hvr-ghc
        packages:
        - cabal-1.22
        - ghc-head
install:
- cabal install -j2 --only-dependencies --enable-tests
before_install:
- export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
- stack +RTS -N1 -RTS --version
- echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo
  '?')]"
- cabal --version
- cabal install -j2 --only-dependencies --enable-tests
sudo: false