Update nixos config for nixos 24.05 i think

nixos/base.nix

@@ -21,8 +21,8 @@
       to = { type = "github"; owner = "nixos"; repo = "nixpkgs"; rev = nixpkgs-flake.rev; };
     };
     nixpkgs-unstable = {
-      from = { type = "indirect"; id = "nixpkgs"; };
-      to = "github:nixos/nixpkgs/nixos-unstable";
+      from = { type = "indirect"; id = "nixpkgs-unstable"; };
+      to = { type = "github"; owner = "nixos"; repo = "nixpkgs"; ref = "nixos-unstable"; };
     };
   };
   nix.nixPath = [ "nixpkgs=${pkgs.path}" ];

nixos/graphical.nix

@@ -10,22 +10,23 @@
   services.xserver = {
     enable = true;
     desktopManager.xfce.enable = true;
-    displayManager = {
-      defaultSession = "xfce";
-      lightdm = {
+    displayManager.lightdm = {
       background = ../backgrounds/${background-image};
       greeters.slick.enable = true;
     };
-    };
 
+    xkb = {
       layout = "fox";
-    xkbOptions = "caps:escape";
+      options = "caps:escape";
       extraLayouts.fox = {
         description = "Layout suitable to be used by a fox";
         languages = ["se"];
         symbolsFile = fox-layout;
       };
     };
+  };
+
+  services.displayManager.defaultSession = "xfce";
 
   console.useXkbConfig = true;