diff --git a/docs/getting-started/vm.md b/docs/getting-started/vm.md
index 2737255..ae7e260 100644
--- a/docs/getting-started/vm.md
+++ b/docs/getting-started/vm.md
@@ -4,11 +4,11 @@ This project provides a virtual machine configuration with all cardano services.
 
 A virtual machine will be started with the following services, and the following ports forwarded from the host to the VM.
 
-| Service      | Port |
-| ------------ | ---- |
-| cardano-node | 3001 |
-| ogmios       | 1337 |
-| kupo         | 1442 |
+| Service      | Port                                           |
+| ------------ | ---------------------------------------------- |
+| cardano-node | 3001                                           |
+| ogmios       | [http://localhost:1337](http://localhost:1337) |
+| kupo         | [http://localhost:1442](http://localhost:1442) |
 
 You can log in with user `root`. The password is empty. In the virtual machine, `cardano-cli` is available to query the node.
 
diff --git a/templates/cluster/configuration.nix b/templates/cluster/configuration.nix
new file mode 100644
index 0000000..5d9cec2
--- /dev/null
+++ b/templates/cluster/configuration.nix
@@ -0,0 +1,10 @@
+{
+  system.stateVersion = "24.11";
+
+  cardano = {
+    network = "preview";
+    node.enable = true;
+    ogmios.enable = true;
+    kupo.enable = true;
+  };
+}
diff --git a/templates/cluster/flake.nix b/templates/cluster/flake.nix
index 990b524..2e07361 100644
--- a/templates/cluster/flake.nix
+++ b/templates/cluster/flake.nix
@@ -16,7 +16,7 @@
           system = "x86_64-linux";
           modules = [
             { networking.hostName = "node1"; }
-            ./preview.nix
+            ./configuration.nix
             cardano-nix.nixosModules.default
           ];
         };
@@ -24,7 +24,7 @@
           system = "x86_64-linux";
           modules = [
             { networking.hostName = "node2"; }
-            ./preview.nix
+            ./configuration.nix
             cardano-nix.nixosModules.default
           ];
         };
@@ -32,7 +32,7 @@
           system = "x86_64-linux";
           modules = [
             { networking.hostName = "node3"; }
-            ./preview.nix
+            ./configuration.nix
             cardano-nix.nixosModules.default
           ];
         };
@@ -57,9 +57,9 @@
             name = "cluster";
             imports = [
               {
-                nodes.node1 = ./preview.nix;
-                nodes.node2 = ./preview.nix;
-                nodes.node3 = ./preview.nix;
+                nodes.node1 = ./configuration.nix;
+                nodes.node2 = ./configuration.nix;
+                nodes.node3 = ./configuration.nix;
                 nodes.status = ./status.nix;
                 nodes.proxy = ./proxy.nix;
                 testScript = _: ''
diff --git a/templates/cluster/preview.nix b/templates/cluster/preview.nix
deleted file mode 100644
index cbb3f22..0000000
--- a/templates/cluster/preview.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-{ config, ... }:
-{
-  cardano = {
-    network = "preview";
-    node.enable = true;
-    ogmios.enable = true;
-    kupo.enable = true;
-  };
-  services.ogmios.host = "0.0.0.0";
-  services.kupo.host = "0.0.0.0";
-  networking.firewall.allowedTCPPorts = [
-    config.services.ogmios.port
-    config.services.kupo.port
-  ];
-}
diff --git a/templates/default/configuration.nix b/templates/default/configuration.nix
index 82af316..e4b8973 100644
--- a/templates/default/configuration.nix
+++ b/templates/default/configuration.nix
@@ -1,4 +1,6 @@
 {
+  system.stateVersion = "24.11";
+
   cardano = {
     network = "preview";
     node.enable = true;
diff --git a/templates/default/vm.nix b/templates/default/vm.nix
index c6cc1fb..81f0c56 100644
--- a/templates/default/vm.nix
+++ b/templates/default/vm.nix
@@ -1,4 +1,5 @@
 {
+  config,
   lib,
   modulesPath,
   ...
@@ -21,6 +22,14 @@
   users.users.root.password = "";
   services.getty.autologinUser = "root";
 
+  services.ogmios.host = "0.0.0.0";
+  services.kupo.host = "0.0.0.0";
+
+  networking.firewall.allowedTCPPorts = [
+    config.services.ogmios.port
+    config.services.kupo.port
+  ];
+
   virtualisation = {
     cores = 2;
     memorySize = lib.mkDefault 4096;