Happy to announce that with https://github.com/NixOS/nixpkgs/pull/292872 merged, we now have the #Lomiri desktop environment available in #NixOS.
Still need to add some more bits & pieces to bring over the entire environment and resolve some issues, so please don't expect it to be as feature-complete & well-integrated as the existing DE options, but I'm glad to already get it into this somewhat-usable state in time for NixOS 24.05.
My TODO list is long, my time limited, and my scheduling horrible. 
@kravemir The Mir compositor does not support the fractional scaling Wayland protocol, if that's what you're asking.
https://wayland.app/protocols/fractional-scale-v1#compositor-support
@Puna thanks for the link. Yes, this is what I've meant.
Fractional scaling is becoming quite an essential feature, as good laptops and monitors come with strange PPI nowadays.
I've just tried KDE Plasma 5.27.11 on NixOS unstable, and fractional scaling works flawlessly.
A bit weird though, that the link shows KWin of version 6.0.1 and up. Maybe, the fractional scaling support got backported?
Tested via:
google-chrome-stable --new-window --app=https://screenresolutiontest.com/
