Resolving dependencies...
Downloading prof2dot-0.3.1...
Configuring prof2dot-0.3.1...
Building prof2dot-0.3.1...
Preprocessing executable 'prof2dot' for prof2dot-0.3.1...

Prof2Dot.hs:1:1:
    Ambiguous module name `Prelude':
      it was found in multiple packages: base haskell98-2.0.0.2
Failed to install prof2dot-0.3.1
cabal: Error: some packages failed to install:
prof2dot-0.3.1 failed during the building phase. The exception was:
ExitFailure 1