File _constraints of Package agama

<constraints>
  <hardware>
    <jobs>4</jobs>
    <disk>
      <size unit="G">25</size>
    </disk>
    <physicalmemory>
      <size unit="G">8</size>
    </physicalmemory>
  </hardware>
  <hostlabel exclude="true">SLOW_CPU</hostlabel>
</constraints>