@lsmith77 I think the `--prefer-source` does the trick. Actually many build are failing with [`Could not authenticate against github.com`](https://travis-ci.org/Sylius/Sylius/jobs/25704900#L455). [The last comment here](http://help.pagodabox.com/customer/portal/questions/6193893-failed-to-download-doctrine-common-from-dist-could-not-authenticate-against-github-com) states this IMHO.