Unbreak the build on AppVeyor.
Unbreak the build on AppVeyor.

kolmodin/cabal,sopvop/cabal,Heather/cabal,Heather/cabal,themoritz/cabal,sopvop/cabal,garetxe/cabal,thomie/cabal,themoritz/cabal,kolmodin/cabal,themoritz/cabal,mydaum/cabal,gbaz/cabal,headprogrammingczar/cabal,sopvop/cabal,bennofs/cabal,thomie/cabal,bennofs/cabal,headprogrammingczar/cabal,gbaz/cabal,mydaum/cabal,garetxe/cabal