[pok@localhost rpmfluff]$ virtualenv-3 --system-site-packages venv
Using base prefix '/usr'
New python executable in /home/pok/Checkouts/rpmfluff/venv/bin/python3
Also creating executable in /home/pok/Checkouts/rpmfluff/venv/bin/python
Installing setuptools, pip, wheel...done.
[pok@localhost rpmfluff]$ source venv/bin/activate
(venv) [pok@localhost rpmfluff]$ pip install --ignore-installed rpmfluff
Collecting rpmfluff
  Downloading https://files.pythonhosted.org/packages/b0/2d/472051f57460ea252349620c204f14bb9d92f8c3647025e5d9741c364e6a/rpmfluff-0.5.4.1.tar.gz
Building wheels for collected packages: rpmfluff
  Running setup.py bdist_wheel for rpmfluff ... done
  Stored in directory: /home/pok/.cache/pip/wheels/9f/71/df/5cc9ce086c2910ec7ed052875ac3bc95d7be9b5ac096a38710
Successfully built rpmfluff
Installing collected packages: rpmfluff
Successfully installed rpmfluff-0.5.4.1
(venv) [pok@localhost rpmfluff]$ python -c "import rpmfluff"
(venv) [pok@localhost rpmfluff]$ echo $?
0