title: pip list after copy folder with whole venv
body: <p>Is it possible to list correctly (pip list) libraries that were installed previously after copy it from backup?
  After copy the project from backup which has own venv inside this folder to new computer it doesn't show me the list correctly. In folder
  venv/lib/python3.8/site-packages
  I see all libraries the project needs to open but pip list show me default list of my computer.</p>