{ ... }: {
  networking.useNetworkd = true;
  systemd.network = {
    enable = true;
    netdevs."20-br0".netdevConfig = {
      Kind = "bridge";
      Name = "br0";
    };
    networks = {
      "40-br0" = {
        matchConfig.Name = "br0";
        bridgeConfig = {};
        linkConfig = {
          RequiredForOnline = "routable";
        };
        networkConfig = {
          DHCP = "ipv4";
          IPv6AcceptRA = true;
        };
      };
    };
  };
}