Change external to ISO, the most likely way I'll use it

hosts/iso/default.nix

@@ -0,0 +1,21 @@
+{ ... }:
+{
+  imports = [
+    ./filesystems
+    ./hardware
+    ./users
+    ../../modules/system
+  ];
+
+  networking = {
+    hostName = "extern";
+    wireguard.interfaces.wgc.ips = [ "10.100.0.21/24" ];
+  };
+
+  system = {
+    desktop.enable = true;
+    wireless.enable = true;
+    wireguard.client.enable = true;
+    stateVersion = "24.11";
+  };
+}