title: yocto: rebuild part of project
body: <p>I have a project which is using yocto for building libraries including gstreamer. I found out that I need to patch some gstreamer element thus creating new bitbake recipe with patch.. </p>
  
  <p>I usually have to run bitbake with image name as parameter which will rebuild whole yocto (which is quite long):</p>
  
  <pre><code>MACHINE=some_machine nice bitbake yocto-etc-etc
  </code></pre>
  
  <p>How do I rebuild just that part which I need and not whole yocto?
  I heard about <a href="http://www.yoctoproject.org/docs/2.0.1/dev-manual/dev-manual.html#using-devtool-in-your-workflow" rel="noreferrer">devtool</a>, but I am not sure how to use that.</p>