simplify autoUpgrade

Signed-off-by: Harald Hoyer <harald@hoyer.xyz>

modules/nixos/services/base/default.nix

@@ -7,6 +7,7 @@ in
 {
   options.plusultra.base = with types; {
     enable = mkBoolOpt false "Whether or not to enable the base config.";
+
   };
 
   config = mkIf cfg.enable {
@@ -114,5 +115,16 @@ in
       initrd.systemd.enable = true;
       kernelPackages = lib.mkOverride 0 pkgs.linuxPackages_latest;
     };
+
+    system.autoUpgrade = {
+      flags = [
+        "--update-input"
+        "nixpkgs"
+        "--update-input"
+        "unstable"
+      ];
+      flake = "git+https://git.hoyer.xyz/harald/nixcfg";
+    };
+
   };
 }