{
  ifwait
, serviceFns
}:
{
  ifup = name : ifname : mac: ''
    . ${serviceFns}
    ${ifwait}/bin/ifwait -v ${ifname} present
    ${if (mac == null) then "" else ''
      ip link set down dev ${ifname}
      ip link set dev ${ifname} address ${mac}
    ''}
    ip link set up dev ${ifname}
    (in_outputs ${name}
     echo ${ifname} > ifname
     cat /sys/class/net/${ifname}/address > ether
    )
  '';
}