title: Force `sdist` to create .zip archive even on Linux
body: <p>I know it is possible to force <code>sdist</code> to produce .zip from command line:</p>
  
  <pre><code>python setup.py sdist --formats=zip
  </code></pre>
  
  <p>But how to make this option a default for my <code>setup.py</code>?</p>
  
  <p>I'd like to get consistency for running <code>setup.py sdist</code> on both Windows and Linux, and I choose .zip format, because I can <a href="http://techtonik.rainforce.org/2015/01/shipping-python-tools-in-executable-zip.html" rel="noreferrer">turn .zip into executable</a>.</p>