Resolving dependencies... Downloading hapstone-0.1.0.0... Configuring hapstone-0.1.0.0... cabal: The program 'c2hs' is required but it could not be found. Failed to install hapstone-0.1.0.0 cabal: Error: some packages failed to install: hapstone-0.1.0.0 failed during the configure step. The exception was: ExitFailure 1