The problem is to find a common PyPI-style host for nightly builds that we would agree on. The scikit-learn CI publishes a wheels for the master branch on a nightly basis and uses the numpy and scipy wheels to tests itself against their master branch. For this we all use the http://wheels.scipy.org via the https://github.com/ogrisel/wheelhouse-uploader tool that uploads wheels to a shared rackspace file container, delete older dev wheels and update the index page if necessary. We do not want to publish nightly wheels to the main PyPI to avoid bloating it with files that are only useful for continuous integration and testing. In particular the main PyPI host would not allow for the automatic deletion of older nightly builds as far as I know. -- Olivier