Resolving dependencies...
Downloading heroku-0.1.1...
Configuring heroku-0.1.1...
Building heroku-0.1.1...
Preprocessing library heroku-0.1.1...

Web/Heroku/Postgres.hs:7:8:
    Could not find module `Web.Heroku.Internal'
    Use -v to see a list of the files searched for.
Failed to install heroku-0.1.1
cabal: Error: some packages failed to install:
heroku-0.1.1 failed during the building phase. The exception was:
ExitFailure 1