display

modules/applications/niri/nixos.nix

@@ -1,4 +1,9 @@
 { config, pkgs, ... }:
+let
+  wdisplays = pkgs.wdisplays.overrideAttrs (oldAttrs: {
+    patches = (oldAttrs.patches or [ ]) ++ [ ./wdisplays-canonical-scale.patch ];
+  });
+in
 {
   programs.niri.enable = true;
 
@@ -6,8 +11,10 @@
   # user units with NixOS. Without this, Ly cannot start niri-session.
   systemd.packages = [ config.programs.niri.package ];
 
-  environment.systemPackages = with pkgs; [
-    wdisplays # Wayland display configuration GUI
-    wlr-randr # Wayland output management CLI
+  environment.systemPackages = [
+    # Keep the transient Wayland-native GUI, with fractional scales rounded to
+    # the same wl_fixed_t value that niri receives on the first Apply.
+    wdisplays
+    pkgs.wlr-randr # Wayland output management CLI
   ];
 }