Steve Dower added the comment:
This is better reported at https://github.com/pypa/pip, as it will be fixed out
of their repository and then updated into here.
Seems like the failed install did not roll back properly. Those directories are
the backup of the uninstallation so that if it fails,
New submission from Charley Riley :
After installing Python 3.9.1 on Windows 10 system-wide to "C:\Program
Files\Python39", I tried to pip install the package 'dirsearch'.
pip refused with the error: "Defaulting to user installation because normal
site-packages is not writeable", and proceede
