Ember beta or Ember Data beta don’t get properly installed after e12c4ca

[backspace]

Hey, this is extracted from #207, which I thought was the same problem but isn’t!

As @kategengler suggested, when I tried installing e12c4ca, it worked as expected with the travis-web ember-try configuration of 'ember-source': 'beta' and 'ember-data': 'beta'. After that commit, ember try:one ember-data fails because the ember-source package isn’t installed.

You can see an example of such a failure here.

Let me know if there’s any other information I can provide. Thanks for all the work on this, I appreciate the automation so we can try to find issues with the betas early!

[kategengler]

@backspace Thanks for extracting this issue!