Resolving dependencies... Downloading cap-1.0.1... Configuring cap-1.0.1... Building cap-1.0.1... Preprocessing executable 'cap' for cap-1.0.1... src/Language/Cap/Main.hs:1:1: Ambiguous module name `Prelude': it was found in multiple packages: base haskell98-2.0.0.2 Failed to install cap-1.0.1 cabal: Error: some packages failed to install: cap-1.0.1 failed during the building phase. The exception was: ExitFailure 1