Enable daily auto-upgrade on strixi-minaj, railbird-sf, and ryzen-shine

Set the autoUpgrade flake reference globally in configuration.nix so
machines only need to opt in with system.autoUpgrade.enable.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

nixos/configuration.nix

@@ -54,7 +54,11 @@
     features.full.enable = lib.mkEnableOption "Do everything";
   };
 
-  config = lib.mkIf config.features.full.enable {
+  config = lib.mkMerge [
+    {
+      system.autoUpgrade.flake = "github:colonelpanic8/dotfiles?dir=nixos#${config.networking.hostName}";
+    }
+    (lib.mkIf config.features.full.enable {
       myModules.base.enable = true;
       myModules.desktop.enable = true;
       myModules.plasma.enable = true;
@@ -66,5 +70,6 @@
       myModules.games.enable = false;
       myModules.syncthing.enable = true;
       myModules.fonts.enable = true;
-  };
+    })
+  ];
 }

nixos/machines/railbird-sf.nix

@@ -90,5 +90,10 @@
     }
   ];
 
+  system.autoUpgrade = {
+    enable = true;
+    dates = "daily";
+  };
+
   system.stateVersion = "23.11";
 }

nixos/machines/ryzen-shine.nix

@@ -82,6 +82,11 @@
   # services.xrdp.defaultWindowManager = "startplasma-x11";
   # services.xrdp.openFirewall = true;
 
+  system.autoUpgrade = {
+    enable = true;
+    dates = "daily";
+  };
+
   system.stateVersion = "20.03";
   home-manager.sharedModules = [
     {

nixos/machines/strixi-minaj.nix

@@ -91,5 +91,10 @@
     }
   ];
 
+  system.autoUpgrade = {
+    enable = true;
+    dates = "daily";
+  };
+
   system.stateVersion = "23.05";
 }