diff --git a/flake.nix b/flake.nix
index 4883cd6..15da3fa 100644
--- a/flake.nix
+++ b/flake.nix
@@ -63,13 +63,12 @@
           ./machine/empyrean
         ];
       };
-      imperium = nixpkgs-2311.lib.nixosSystem {
+      imperium = nixpkgs-2405.lib.nixosSystem {
         system = "x86_64-linux";
         modules = [
           self.nixosModules.beatific
-          (pinNixpkgs nixpkgs-2311)
           ({ ... }: {
-            environment.systemPackages = [ nixpkgs-2311.legacyPackages."i686-linux".gperftools ];
+            environment.systemPackages = [ nixpkgs-2405.legacyPackages."i686-linux".gperftools ];
           })
           ./machine/imperium
         ];
diff --git a/machine/imperium/default.nix b/machine/imperium/default.nix
index b7fb28b..322b75d 100644
--- a/machine/imperium/default.nix
+++ b/machine/imperium/default.nix
@@ -31,8 +31,8 @@
     desktopManager.gnome.enable = true;
 
     # keyboard
-    layout = "us";
-    xkbVariant = "";
+    xkb.layout = "us";
+    xkb.variant = "";
   };
 
   # Enable sound with pipewire.
@@ -51,7 +51,7 @@
   services.printing.drivers = [ pkgs.hplip ];
   services.avahi = {
     enable = true;
-    nssmdns = true;
+    nssmdns4 = true;
     openFirewall = true;
   };