diff --git a/configurations/london/default.nix b/configurations/london/default.nix
index 633aca0..26598bd 100644
--- a/configurations/london/default.nix
+++ b/configurations/london/default.nix
@@ -21,6 +21,7 @@
   nixpkgs.config.allowUnfree = true;
   nix.settings.system-features = [
     "kvm"
+    "big-parallel"
   ];
 
   services.openvpn.servers = {