diff --git a/dev_system.nix b/dev_system.nix
index e32b08c..9283dd6 100644
--- a/dev_system.nix
+++ b/dev_system.nix
@@ -47,6 +47,7 @@ in
 
     nat = {
       enable = true;
+      externalInterface = "enp9s0";
       forwardPorts = [
         {
           destination = "localhost:8001";