<constraints>

  <overwrite>

    <conditions>

      <arch>aarch64</arch>

      <arch>ppc</arch>

      <arch>x86_64</arch>

      <arch>i586</arch>

    </conditions>

    <hardware>

      <disk>

        <size unit="G">9</size>

      </disk>

    </hardware>

  </overwrite>

  <overwrite>

    <conditions>

      <arch>ppc64</arch>

      <arch>ppc64le</arch>

    </conditions>

    <hardware>

      <disk>

        <size unit="G">9</size>

      </disk>

      <physicalmemory>

        <size unit="G">20</size>

      </physicalmemory>

    </hardware>

  </overwrite>

</constraints>

​