heroku/heroku-buildpack-ruby — pull request #266 by leemhenson (2014-04-22 11:10:46+00:00)
Title: allow config var override of BUILDPACK_VENDOR_URL

I wanted to use a custom ruby-2.1.1 build, but couldn't find a way to modify BUILDPACK_VENDOR_URL without resorting to code in bin/compile. Is there a better way of doing this?