Comment 7 for bug 1879184

As far as I understood, we have a couple of issues when we get an env with very strict network access here:
1) pip is always searching for packages online: there is no configuration on ~/.pydistutils.cfg to prevent that. From what dmitriis pointed me, this rollback fixes it: https://github.com/juju-solutions/layer-basic/pull/169/files

Then, 2) appdirs-1.4.4 seems not to be working. I am rolled back to 1.4.3 (which is used on the stable version of this charm) and I could install. Otherwise, 1.4.4 fails with: https://pastebin.canonical.com/p/MfpvPBjzZn/