{ lib }:
{
  bridgeName = id: "br-vlan${toString id}";

  deriveMac =
    name:
    let
      hash = builtins.hashString "sha256" name;
      octet = i: builtins.substring (i * 2) 2 hash;
    in
    lib.concatStringsSep ":" ([ "02" ] ++ map octet [ 0 1 2 3 4 ]);
}