Gnome scaling on Wayland/Sway?

I want to set up scaling through dconf, by setting org.gnome.desktop.interface scaling-factor (using output scaling makes some apps blurry and doesn’t work for non-Wayland apps). I’ve enabled the dconf service, used dconf-editor to change the value (I don’t know / haven’t succeeded at setting it declaratively), no change and settings get org.gnome.desktop.interface scaling-factor returns “No schemas installed”.

I would appreciate any hints, I suppose someone out there has a HiDPI setup and found a way?

I added this to my NixOS configuration:

services.xserver.desktopManager.gnome.sessionPath = [ mutter gnome-shell nautilus ]