⚠️ Note that both lib\python\x64\python39._pth and lib\python\x64\python39._pth contain custom ../packages entry.

:: Install/upgrade additional packages
lib\python\x64\python.exe -m pip install --upgrade -t lib\python\packages -r lib\requirements.txt

• Initial pip installation
  • download https://bootstrap.pypa.io/get-pip.py
  • run "lib\python\x64\python.exe get-pip.py" (this will create lib\python\x64\Lib and lib\python\x64\Scripts directories)
  • copy lib\python\x64\Lib\site-packages contents to lib\python\packages
  • make sure lib\python\packages contains .gitignore file with the following entry: __pycache__/
  • now pip could be run like this: lib\python\x64\python.exe -m pip
  • remove lib\python\x64\Lib and lib\python\x64\Scripts