I was in the wrong room during https://phabricator.wikimedia.org/T222490 but overheard that it was not tested on Windows yet. I think I got it running over here and wrote a log of the steps and tools I used. It would be great to meet up with someone from the releng team on Saturday to test my local setup. If it is found to be working I would add the docs under https://gerrit.wikimedia.org/g/releng/local-charts/+/refs/heads/master#windows.
Let me know whether this is relevant for anyone and I will look into my old notes - but I think upstream changed as well so one would most likely need to start over anyways. So I am off of this and can be closed as far as I am concerned.