title: How to cleanup sources to rebuild package with dpkg-buildpackage?
body: <p>I'm playing with dpkg, but I got rather strange problem: Package can not be build second time after 1st package was successfully build.</p>
  
  <pre><code>dpkg-buildpackage -sa
  ....
  dpkg-source: warning: newly created empty file 'build/lib.linux-x86_64-2.7/neutron/api/__init__.py' will not be represented in diff
  (repeats 100500 times for different files).
  </code></pre>
  
  <p>How can I to rebuild deb second time?</p>
  
  <p>It looks like I miss some cleanup command.</p>