
Virtualenv has recently been upgraded to 1.11, which comes with pip 1.5. In this version of pip, if 'pip install' can find a wheel, it downloads it instead of the tar.gz. This is an issue since the version of pip used in the gates can still be too old to work with wheels by default. Use '--no-use-wheel' in the 'pip install' command to fix this. Closes-Bug: #1276242 Change-Id: I00a32b3abd3b08703f66834ae30e6c4b0cf7bd7d