Resolving dependencies...
Downloading Ebnf2ps-1.0.10...
Configuring Ebnf2ps-1.0.10...
Building Ebnf2ps-1.0.10...
Preprocessing executable 'ebnf2ps' for Ebnf2ps-1.0.10...

src/Ebnf2ps.hs:1:1:
    Ambiguous module name `Prelude':
      it was found in multiple packages: base haskell98-2.0.0.2
Failed to install Ebnf2ps-1.0.10
cabal: Error: some packages failed to install:
Ebnf2ps-1.0.10 failed during the building phase. The exception was:
ExitFailure 1