Mine

<contents>
  <dir name="/">      
    <dir name="bin" baseinstalldir="/">
      <file name="archie" role="script" />
    </dir>
  </dir>
</contents>


$ pear list-files build/package2.xml
Contents of package2.xml
========================
Package File Install Path
bin/archie   /usr/local/php5/bin/bin/archie