        <code class="code">ARCH</code>: architecture of the system, eg. amd64
      </span>
    </li>
    <li>
      <span>
        <code class="code">OS</code>: current operating system (linux, darwin,
        etc).
      </span>
    </li>
    <li>
      <span>
        <code class="code">PATH</code>: usual PATH environment variable as
        defined in your .plzconfig
      </span>
    </li>
    <li>
      <span>
        <code class="code">TMP_DIR</code>: the temporary directory you're
        compiling w