Comment 10 for bug 1635463

Hello,

for what it's worth, the problem comes from the debianized version of virtualenv which uses a debundled version of pkg_resource which gets added into the virtualenv at creation time :

$ virtualenv .
Running virtualenv with interpreter /usr/bin/python2
New python executable in /home/caribou/git/quividi/test/bin/python2
Also creating executable in /home/caribou/git/quividi/test/bin/python
Installing setuptools, pkg_resources, pip, wheel...done.
$ pip freeze
pkg-resources==0.0.0

Using the pip installed version of virtualenv can be a workable workaround :

$ sudo apt -y purge python3-virtualenv virtualenv tox
$ pip install virtualenv
$ virtualenv .
pip install virtualenv
Collecting virtualenv
  Downloading https://files.pythonhosted.org/packages/c5/97/00dd42a0fc41e9016b23f07ec7f657f636cb672fad9cf72b80f8f65c6a46/virtualenv-16.7.7-py2.py3-none-any.whl (3.4MB)
    100% |████████████████████████████████| 3.4MB 351kB/s
Installing collected packages: virtualenv
Successfully installed virtualenv-16.7.7
$ virtualenv .
New python executable in /home/caribou/git/quividi/test/bin/python
Installing setuptools, pip, wheel...
done.
$ source bin/activate
$ pip freeze
$

hth,
...Louis