Resolving dependencies... Downloading atl-15321.1... Configuring atl-15321.1... Building atl-15321.1... Preprocessing library atl-15321.1... Control/Arrow/State.hs:9:8: Could not find module `Util' It is a member of the hidden package `ghc-7.6.3'. Perhaps you need to add `ghc' to the build-depends in your .cabal file. Use -v to see a list of the files searched for. Failed to install atl-15321.1 cabal: Error: some packages failed to install: atl-15321.1 failed during the building phase. The exception was: ExitFailure 1