progrium/buildstep — pull request #64 by plietar (2013-12-05 23:23:52+00:00)
Title: Use a subdirectory of /cache

Heroku tends to remove the /cache directory.
This causes issues with dokku, when we mount it using docker volumes.
So make the buildpacks use a subdirectory of the mount point.

Fixes https://github.com/progrium/dokku/issues/371