Hi,
It is may be the same bug as the one in my bug report here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=945887 I found a solution by editing the following file after installation: /usr/lib/python3/dist-packages/testpath-.egg-info (provided by python3-testpath) The 'Version:' field should not be an empty string and changing by the following: Version: 0.4.2 solved my issue. Best, Patrice
