diff --git a/configuration.nix b/configuration.nix
index 21bd60b..95bea42 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -94,16 +94,16 @@ in
     LC_TIME = "en_GB.UTF-8";
   };
   
-  services.xserver = {
+  services = {
     enable = true;
     desktopManager = {
       xterm.enable = false;
       plasma6.enable = true;
+      sddm.enable = true;
+      defaultSession = "plasma6";
     };
   };
-  services.displayManager.sddm.enable = true;
-  services.displayManager.defaultSession = "plasma6";
-
+  
   # Configure keymap in X11
   services.xserver = {
     xkb.layout = "gb";
diff --git a/nixos-switch.log b/nixos-switch.log
index 4d6948b..649bb77 100644
--- a/nixos-switch.log
+++ b/nixos-switch.log
@@ -1,28 +1,71 @@
-building Nix...
-building the system configuration...
-trace: warning: The option `services.xserver.desktopManager.plasma6.enable' defined in `/etc/nixos/configuration.nix' has been renamed to `services.desktopManager.plasma6.enable'.
 error:
-       … while calling the 'head' builtin
+       … while evaluating the attribute 'config'
 
-         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/attrsets.nix:1575:11:
+         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:
 
-         1574|         || pred here (elemAt values 1) (head values) then
-         1575|           head values
-             |           ^
-         1576|         else
-
-       … while evaluating the attribute 'value'
-
-         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:809:9:
-
-          808|     in warnDeprecation opt //
-          809|       { value = builtins.addErrorContext "while evaluating the option `${showOption loc}':" value;
+          321|         options = checked options;
+          322|         config = checked (removeAttrs config [ "_module" ]);
              |         ^
-          810|         inherit (res.defsFinal') highestPrio;
+          323|         _module = checked (config._module);
+
+       … while calling the 'seq' builtin
+
+         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:
+
+          321|         options = checked options;
+          322|         config = checked (removeAttrs config [ "_module" ]);
+             |                  ^
+          323|         _module = checked (config._module);
 
        (stack trace truncated; use '--show-trace' to show the full trace)
 
-       error: Default graphical session, 'plasma6', not found.
-       Valid names for 'services.displayManager.defaultSession' are:
-         plasma
-         plasmax11
+       error: The option `services.desktopManager.defaultSession' does not exist. Definition values:
+       - In `/etc/nixos/configuration.nix': "plasma6"
+building Nix...
+error:
+       … while evaluating the attribute 'config'
+
+         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:
+
+          321|         options = checked options;
+          322|         config = checked (removeAttrs config [ "_module" ]);
+             |         ^
+          323|         _module = checked (config._module);
+
+       … while calling the 'seq' builtin
+
+         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:
+
+          321|         options = checked options;
+          322|         config = checked (removeAttrs config [ "_module" ]);
+             |                  ^
+          323|         _module = checked (config._module);
+
+       (stack trace truncated; use '--show-trace' to show the full trace)
+
+       error: The option `services.desktopManager.defaultSession' does not exist. Definition values:
+       - In `/etc/nixos/configuration.nix': "plasma6"
+building the system configuration...
+error:
+       … while evaluating the attribute 'config.system.build.toplevel'
+
+         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:9:
+
+          321|         options = checked options;
+          322|         config = checked (removeAttrs config [ "_module" ]);
+             |         ^
+          323|         _module = checked (config._module);
+
+       … while calling the 'seq' builtin
+
+         at /nix/var/nix/profiles/per-user/root/channels/nixos/lib/modules.nix:322:18:
+
+          321|         options = checked options;
+          322|         config = checked (removeAttrs config [ "_module" ]);
+             |                  ^
+          323|         _module = checked (config._module);
+
+       (stack trace truncated; use '--show-trace' to show the full trace)
+
+       error: The option `services.desktopManager.defaultSession' does not exist. Definition values:
+       - In `/etc/nixos/configuration.nix': "plasma6"