diff --git a/hosts/containers/yggdrasil/default.nix b/hosts/containers/yggdrasil/default.nix
index 7e63e0bd..ae7347a9 100644
--- a/hosts/containers/yggdrasil/default.nix
+++ b/hosts/containers/yggdrasil/default.nix
@@ -25,6 +25,8 @@ in {
     firewall.enable = false;
     defaultGateway = "172.20.72.6";
     defaultGateway6 = "2a02:8106:208:5281::b:0";
+    # systemd-networkd breaks setting default routes. so sad.
+    useNetworkd = pkgs.lib.mkForce false;
     nameservers = [ "172.20.73.8" ];
     interfaces.eth0 = {
       ipv4 = {