figured out mount problems

kde.nix

@@ -6,11 +6,25 @@
   services = {
     # Enable the KDE Plasma Desktop Environment.
     xserver = {
-      displayManager.sddm.enable = true;
       desktopManager.plasma5.enable = true;
+
+      displayManager = {
+        sddm.enable = true;
+        defaultSession = "plasmawayland";
+      };
     };
   };
 
+  environment.plasma5.excludePackages = with pkgs.libsForQt5; [
+    elisa
+    gwenview
+    okular
+    khelpcenter
+  ];
+
+  programs.dconf.enable = true;
+  programs.partition-manager.enable = true;
+
   home-manager.users.vinzenz = {
     config,
     pkgs,
@@ -20,6 +34,7 @@
       packages = with pkgs; [
       ];
     };
+
     services.kdeconnect = {
       enable = true;
       indicator = true;