@@ -33,14 +33,14 @@ matrix:
3333 # https://github.com/hvr/multi-ghc-travis
3434 - env: BUILD=cabal GHCVER=7.8.4 CABALVER=1.18
3535 compiler: ": #GHC 7.8.4"
36− addons: {apt: {packages: [cabal-install-1.18,ghc-7.8.4], sources: [hvr-ghc]}}
36+ addons: {apt: {packages: [cabal-install-1.18,ghc-7.8.4,happy-1.19.5], sources: [hvr-ghc]}}
3737 - env: BUILD=cabal GHCVER=7.10.3 CABALVER=1.22
3838 compiler: ": #GHC 7.10.3"
39− addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.3], sources: [hvr-ghc]}}
39+ addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.3,happy-1.19.5], sources: [hvr-ghc]}}
4040
4141 - env: BUILD=cabal GHCVER=8.0.1 CABALVER=1.24
4242 compiler: ": #GHC 8.0.1"
43− addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.1], sources: [hvr-ghc]}}
43+ addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.1,happy-1.19.5], sources: [hvr-ghc]}}
4444
4545 # Build with the newest GHC and cabal-install. This is an accepted failure,
4646 # see below.