As in title. Right now, I'd have to first clear the thin rock roof, then build a regular roof, then place the skylight. Possible to just treat thin rock as if it were constructed roof?

I understand why for obvious reasons you can't build a skylight on overhead mountain roofs (despite Khazad-dûm managing to pull it off :) ).

Oh, and there seems to be an odd interaction with your skylights and your swimming pools from your Bad Hygiene mod. I tried building a skylight over a pool, and it constructed a "phantom" bridge in the pool instead where the glass squares should have been. I can't select it, but when I hover over those squares in the pool now instead of saying "pool water" they say "smooth granite", which in this case was the underlying floor.