Resolving dependencies...
Downloading CPBrainfuck-1.0...
Configuring CPBrainfuck-1.0...
Building CPBrainfuck-1.0...
Preprocessing executable 'bf' for CPBrainfuck-1.0...

BF.hs:1:1:
    Ambiguous module name `Prelude':
      it was found in multiple packages: base haskell98-2.0.0.2
Failed to install CPBrainfuck-1.0
cabal: Error: some packages failed to install:
CPBrainfuck-1.0 failed during the building phase. The exception was:
ExitFailure 1