Add qemu guest agent to all VMs

hosts/ns2/configuration.nix

@@ -1,14 +1,19 @@
-{ config, lib, pkgs, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 
 {
-  imports =
-    [
-      ../template/hardware-configuration.nix
+  imports = [
+    ../template/hardware-configuration.nix
 
-      ../../system
-      ../../services/ns/secondary-authorative.nix
-      ../../services/ns/resolver.nix
-    ];
+    ../../system
+    ../../services/ns/secondary-authorative.nix
+    ../../services/ns/resolver.nix
+    ../../common/vm
+  ];
 
   nixpkgs.config.allowUnfree = true;
   # Use the systemd-boot EFI boot loader.
@@ -38,7 +43,10 @@
   };
   time.timeZone = "Europe/Oslo";
 
-  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+  nix.settings.experimental-features = [
+    "nix-command"
+    "flakes"
+  ];
   environment.systemPackages = with pkgs; [
     vim
     wget
@@ -53,4 +61,3 @@
 
   system.stateVersion = "23.11"; # Did you read the comment?
 }
-