luciferous/heroku-buildpack-haskell — pull request #2 by mwotton (2012-06-17 00:27:44+00:00)
Title: this seemed to fix my problems

changes: removed the "no" response, explicitly exited with 0 when detected, and switched to explicit #!/bin/bash. Not sure which one actually made a difference, but this is more closely modelled on the heroku docs.