We need to use `builds.emberjs.com/latest/ember.prod.js` here as we need to include the changes from https://github.com/emberjs/ember.js/commit/89620cb4fd6eee6ee2af6e705d3f69c34df8c4fa and https://github.com/emberjs/ember.js/commit/451cf2b8b241cbf67b6491532520e83b80b5df7a.

We can update to `builds.emberjs/tags/v1.0.0-rc.8.js` and `builds.emberjs.com/tags/v1.0.0-rc8.prod.js` when RC8 is pushed out.