Fix everything.

system/default.nix

@@ -0,0 +1,24 @@
+{ lib, ... }:
+{
+  imports = [
+    ./accounts
+    ./devices
+    ./programs
+    ./secrets
+    ./services
+    ./settings
+  ];
+
+  options.system = with lib; {
+    server.enable = mkEnableOption "Enable server apps and services";
+  };
+
+  config = {
+    networking = {
+      hostName = "rubble";
+      hostId = "e0b1fcef";
+    };
+
+    system.stateVersion = "24.11";
+  };
+}