appveyor exp 2 https://github.com/appveyor/ci/issues/806#issuecomment-219230487
appveyor exp 2 https://github.com/appveyor/ci/issues/806#issuecomment-219230487

giampaolo/psutil,0-wiz-0/psutil,0-wiz-0/psutil,giampaolo/psutil