Quick/Nimble — pull request #44 by jspahrsummers (2014-10-21 18:34:48+00:00)
Title: Only allow x86_64 for OS X builds

This hack fix prevents the OS X target from being picked up during iOS simulator builds on the command line.

For some reason, I only encountered this issue with using [xctool](https://github.com/facebook/xctool), not `xcodebuild`—however, the former just shells out to the latter, so assumably this could happen in other scenarios too.