diff --git a/nixosConfigurations/muede-lpt2/default.nix b/nixosConfigurations/muede-lpt2/default.nix
index c62e807..3fbabf3 100644
--- a/nixosConfigurations/muede-lpt2/default.nix
+++ b/nixosConfigurations/muede-lpt2/default.nix
@@ -37,9 +37,12 @@
       "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO1CRn4yYTL4XUdCebE8Z4ZeuMujBjorTdWifg911EOv pc2 home roaming"
     ];
 
-    # `programs.adb` removed in nixpkgs 26.05 (systemd 258 handles uaccess); add pkgs.android-tools to systemPackages if adb is needed
-    # `programs.light` removed in nixpkgs 26.05; replace with brightnessctl or hardware.acpilight when re-enabling
-    environment.systemPackages = [ pkgs.android-tools ];
+    # brightnessctl's udev rules grant the `video` group write access to backlight brightness (muede is in `video`)
+    environment.systemPackages = [
+      pkgs.android-tools
+      pkgs.brightnessctl
+    ];
+    services.udev.packages = [ pkgs.brightnessctl ];
 
     networking.firewall.allowedTCPPorts = [
       8776