title: Create wheel without building dependencies
body: <p>I have a sample project:</p>
  <pre><code>test/
      - __init__.py
      - module.py
      - setup.py
  </code></pre>
  <p><code>setup.py</code> is just</p>
  <pre><code>from setuptools import setup
  
  setup(name='test', install_requires=['numpy'])
  </code></pre>
  <p>Then when I call <code>pip wheel .</code>, it automatically makes a wheel for <code>numpy</code>. Can I make it not do that? It's my understanding that when you install a wheel, it will automatically go download and install any missing dependencies. Is the <code>numpy</code> wheel needed for making my test wheel?</p>