Пересобрать hash

  $phone={
    '100' => { 'pass'    => "qwrsdf86",
               'mac'     => "00:15:65:e0:68:47",
               'profile' => "YealinkT21PE2",
             },
    '101' => { 'pass'    => "qwrsdf86",
               'mac'     => "00:15:65:e0:68:48",
               'profile' => "YealinkT21PE2",
             },
    '102' => { 'pass'    => "qwrsdf86",
               'mac'     => "00:15:65:e0:68:49",
               'profile' => "YealinkT21PE2",
             },
  }

Требуется поллучить такой вид

$vpn_name_key=["001565e06847", "001565e06848", "001565e06849"]

$vpn_name_key=[]
$phone.each |$index, $value| {
    $linemac = regsubst($value['mac'], ':', '', 'G')
    $vpn_name_key = $vpn_name_key + [$linemac]
  }