[externally-managed] Error=To install Python packages system-wide, try 'pacman -S python-xyz', where xyz is the package you are trying to install. If you wish to install a non-MSYS2-packaged Python package, create a virtual environment using 'python -m venv path/to/venv'. Then use path/to/venv/bin/python and path/to/venv/bin/pip.