cabal: cannot configure haskell98-1.1.0.1. It requires directory ==1.1.* For the dependency on directory ==1.1.* there are these packages: directory-1.1.0.0. However none of them are available. directory-1.1.0.0 was excluded because happstack-helpers-0.56 requires directory >=1.0.0.0 && <1.1.0.0