I am having issues installing tripleo behind a proxy/mirror environment. I am using the USB key for the underclound install at it always breaks installing the "pbr" package into the virtual env. It simple will not pull the files from my mirror. Since I can't modify the USB key (read only) I can't pass parameters to "python setup.py" to use the mirror. I have tried defining pip.conf in the users home directory but it is not used. (By hand, pip will use it just fine). Any hints would be appreciated.