It seems the ghcup team wasn’t invited to that meeting, but I’m planning since some time to work towards a windows version of ghcup. That may not address the “installer” issue directly, but it should be easy to build a windows installer around ghcup, without having to duplicate considerable amount of logic.
During the process of investigating this course, I got stuck in the abstract filepath proposal, which I consider a must for porting ghcup to windows.
I sent this proposal for review to the CLC, but haven’t heard back from them in a while.