title: How to use Makefile to switch to a certain catalogue?
body: <p>How can I execute <code>cd moocs/libs/bin</code> command using Makefile?</p>
  <p>If  I write this command into Makefile, it will return when the subprogram is end. What's worse, <code>.ONESHELL</code> doesn't work, either, because of my low version.</p>