Resolving dependencies...
Downloading HRay-1.2.0...
Configuring HRay-1.2.0...
Building HRay-1.2.0...
Preprocessing executable 'HRay' for HRay-1.2.0...

HRayEngine.lhs:12:10:
    Could not find module ‘Maybe’
    Perhaps you meant Maybes (needs flag -package-key ghc-7.10.2)
    Use -v to see a list of the files searched for.

dist/build/HRay/HRay-tmp/HRayParser.hs:18:8:
    Could not find module ‘Char’
    Use -v to see a list of the files searched for.
Failed to install HRay-1.2.0
cabal: Error: some packages failed to install:
HRay-1.2.0 failed during the building phase. The exception was:
ExitFailure 1