diff --git a/nixos/kevin-pc/configuration.nix b/nixos/kevin-pc/configuration.nix
index b9af8ec..8ff1c1b 100644
--- a/nixos/kevin-pc/configuration.nix
+++ b/nixos/kevin-pc/configuration.nix
@@ -68,7 +68,7 @@
   services.clamav.daemon.enable = true;
   services.clamav.updater.enable = true;
 
-  hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.latest;
+  hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.stable;
 
   programs.gnupg.agent = {
     enable = true;
diff --git a/nixos/modules/avahi.nix b/nixos/modules/avahi.nix
index 1ea39e3..27dc132 100644
--- a/nixos/modules/avahi.nix
+++ b/nixos/modules/avahi.nix
@@ -1,7 +1,7 @@
 {
   services.avahi = {
     enable = true;
-    nssmdns = true;
+    nssmdns4 = true;
     publish.enable = true;
     publish.domain = true;
     publish.addresses = true;
diff --git a/nixos/modules/common.nix b/nixos/modules/common.nix
index 4e1651d..5bfded0 100644
--- a/nixos/modules/common.nix
+++ b/nixos/modules/common.nix
@@ -12,7 +12,7 @@
     keyMap = "de";
   };
 
-  services.xserver.layout = "de";   
+  services.xserver.xkb.layout = "de";   
 
   environment.systemPackages = with pkgs; [
     vim