Add virtualization module

configuration.nix

@@ -89,6 +89,7 @@
     ./modules/hardware-configuration.nix
     ./modules/networking.nix
     ./modules/datasync.nix
+    ./modules/virtualization.nix
   ];
 
 }

modules/virtualization.nix

@@ -0,0 +1,11 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # Enable virtualisation
+  virtualisation.libvirtd = {
+    enable = true;
+    onBoot = "ignore";
+    onShutdown = "shutdown";
+    qemuPackage = pkgs.qemu_kvm;
+  };
+}