begriffs/heroku-buildpack-ghc — pull request #11 by elisehuard (2013-12-12 13:37:51+00:00)
Title: fixing inter-device move failed

While deploying to heroku with this build package, I had the typical move error (inter-device move failed) for this line, so I changed into a cp -R.
The build ended up working after many many attempts. Yesod and heroku, not a match made in heaven.