The `.devN` change in #4299 [broke AppVeyor][1] when running `%CMD_IN_ENV% python setup.py bdist_msi`. I'll look into it tomorrow. [1]: https://ci.appveyor.com/project/GoogleCloudPlatform/google-cloud-python/build/1.0.2485.master/job/mn05hqaxcec4bvm7