ode">PKG</code>: the path to the package containing this
        rule
      </span>
    </li>
    <li>
      <span>
        <code class="code">PKG_DIR</code>: Similar to
        <code class="code">PKG</code> but always contains a path (specifically
        <code class="code">.</code> if the rule is in the root of the repo).
      </span>
    </li>
    <li>
      <span><code class="code">NAME</code>: the name of this build rule</span>
    </li>
    <li>
      <span>
        <code class="code">OUT</code>: the