File _constraints of Package racket

<?xml version="1.0"?>
<constraints>
  <sandbox>kvm</sandbox>
  <hostlabel exclude="true">SLOW_CPU</hostlabel>
  <hardware>
  <processors>4</processors>
    <physicalmemory>
      <size unit="G">4</size>
    </physicalmemory>
    <memory>
      <size unit="G">6</size>
    </memory>
    <disk>
      <size unit="G">1</size>
    </disk>
  </hardware>
  <overwrite>
    <conditions>
      <arch>i586</arch>
      <arch>x86_64</arch>
    </conditions>
    <hardware>
      <cpu>
        <flag>mmx</flag>
        <flag>sse</flag>
        <flag>sse2</flag>
        <flag>ssse3</flag>
      </cpu>
    </hardware>
  </overwrite>
</constraints>