diff --git a/spec/focus/default.nix b/spec/focus/default.nix
index 55521803..5c930a44 100644
--- a/spec/focus/default.nix
+++ b/spec/focus/default.nix
@@ -30,6 +30,10 @@
   };
   boot.initrd.systemd.services.zfs-import-focus.after = [ "cryptsetup.target" ];
 
+  services.udev.extraRules = ''
+    SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="6c:b3:11:3d:80:13", NAME="2g5"
+  '';
+
   networking.proxy = {
     default = "socks5://192.168.1.1:1080";
     noProxy = "10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,127.0.0.1,localhost,.localdomain";