enable steamdeck stuffs

hosts/deck/configuration.nix

@@ -2,7 +2,7 @@
 # your system. Help is available in the configuration.nix(5) man page, on
 # https://search.nixos.org/options and in the NixOS manual (`nixos-help`).
 
-{ config, lib, pkgs, ... }:
+{ lib, pkgs, ... }:
 
 {
   imports =
@@ -15,14 +15,43 @@
   boot.loader.efi.canTouchEfiVariables = true;
 
   nixpkgs.config.allowUnfree = true;
+  # Enable nix flakes and nix-command tools
+  nix = {
+    settings = {
+      warn-dirty = lib.mkForce false;
+      experimental-features = lib.mkForce [
+        "nix-command"
+        "flakes"
+      ];
+    };
+
+    # Garbage collect automatically every week
+    gc.automatic = lib.mkDefault true;
+    gc.options = lib.mkDefault "--delete-older-than 30d";
+
+    optimise.automatic = lib.mkDefault true;
+  };
 
   jovian = {
     steam = {
       enable = true;
       autoStart = true;
       user = "deck";
-      # desktopSession = "plasma5";
+      desktopSession = "plasma6";
     };
+
+    steamos = {
+      useSteamOSConfig = true;
+    };
+
+    devices = {
+      steamdeck = {
+        enable = true;
+        enableGyroDsuService = true; # If enabled, motion data from the gyroscope can be used in Cemu with Cemuhoo
+      };
+    };
+
+    hardware.has.amd.gpu = true;
   };
 
   # networking.hostName = "nixos"; # Define your hostname.
@@ -52,6 +81,10 @@
   services.xserver.displayManager.sddm.enable = false;
   services.xserver.desktopManager.plasma5.enable = false;
   
+  services.desktopManager.plasma6 = {
+    enable = true;
+    enableQt5Integration = true;
+  };
 
   # Configure keymap in X11
   # services.xserver.xkb.layout = "us";