How did you get this to work? (See the config and did this before but never got ly to work on nixos, i migth have just been to early i guess)

Ive been using LY on arch for a while, and it is great looking, when it works, but it has lots of issues. Mostly related to multi monitor, kernel warnings filling up the screen, and for all being just sligthly broken. But then again probably user error.