Resolving dependencies... Configuring trhsx-0.2.2... Building trhsx-0.2.2... Preprocessing library trhsx-0.2.2... Trhsx.hs:1:1: Could not find module ‘Prelude’ It is a member of the hidden package ‘base-4.8.1.0’. Perhaps you need to add ‘base’ to the build-depends in your .cabal file. Use -v to see a list of the files searched for. Failed to install trhsx-0.2.2 cabal: Error: some packages failed to install: trhsx-0.2.2 failed during the building phase. The exception was: ExitFailure 1