Resolving dependencies...
Configuring UMM-0.1.0...
Building UMM-0.1.0...
Preprocessing executable 'umm' for UMM-0.1.0...

UMMData.hs:32:8:
    Ambiguous module name `Prelude':
      it was found in multiple packages: base haskell98-2.0.0.2
Failed to install UMM-0.1.0
cabal: Error: some packages failed to install:
UMM-0.1.0 failed during the building phase. The exception was:
ExitFailure 1