Turn monitor off when suspending or shutdown after 9pm

modules/common-desktop/gnome.nix

@@ -1,5 +1,4 @@
 {pkgs, ...}: {
-  hardware.i2c.enable = true;
   environment.systemPackages = with pkgs.gnomeExtensions; [
     caffeine
     open-bar

modules/common-desktop/monitor.nix

@@ -0,0 +1,17 @@
+{
+  pkgs,
+  lib,
+  ...
+}: {
+  hardware.i2c.enable = true;
+  systemd.services.monitor = {
+    script = "if [[ $(${pkgs.coreutils}/bin/date +%H) -ge 20 ]]; then ${lib.meta.getExe pkgs.ddcutil} setvcp D6 05; fi";
+    wantedBy = ["suspend.target" "shutdown.target"];
+    before = ["suspend.target" "shutdown.target"];
+
+    serviceConfig = {
+      StopWhenUnneeded = true;
+      Type = "oneshot";
+    };
+  };
+}

modules/common-desktop/packages.nix

@@ -13,7 +13,6 @@
     heroic
     aspell
     muzika
-    ddcutil
     fractal
     killall
     ripgrep
@@ -29,6 +28,7 @@
     protontricks
     prismlauncher
     android-studio
+    nexusmods-app-unfree
     nodePackages_latest.pnpm
     hunspellDicts.en_CA-large
     inputs.nix-gaming.packages.${system}.wine-ge