Resolving dependencies...
Downloading gtk2hs-buildtools-0.12.0...
Configuring gtk2hs-buildtools-0.12.0...
Building gtk2hs-buildtools-0.12.0...
Preprocessing executable 'gtk2hsTypeGen' for gtk2hs-buildtools-0.12.0...

hierarchyGen/TypeGen.hs:1:1:
    Ambiguous module name `Prelude':
      it was found in multiple packages: base haskell98-2.0.0.2
Failed to install gtk2hs-buildtools-0.12.0
cabal: Error: some packages failed to install:
gtk2hs-buildtools-0.12.0 failed during the building phase. The exception was:
ExitFailure 1