deis/deis — pull request #1382 by Xe (2014-07-21 19:46:24+00:00)
Title: fix(Makefile): Remove bashism in the main Makefile

Mac OSX's make has support for `[[`, Ubuntu's does not. This fix (as suggested and written up by @carmstrong in [a comment](https://github.com/deis/deis/pull/1380#issuecomment-49632570)) removed the bashism in favor of a more compatible syntatic trick.