Dependency on xdgenvpy which has disappeared upstream

[PureTryOut]

The xdgenvpy package on PyPi links to a Gitlab repo that doesn't exist any more. I can't find an alternative repo for it anywhere on the internet either, so I'm assuming it's not maintained any more. Furthermore a source install using the tarball on PyPi is not possible out of the box due to it referencing in setup.py but not including a requirements.txt in the package.

It would be great if this package can be moved away from.