title: python pip on Windows - command 'cl.exe' failed
body: <p>I'm trying to install spaCy using <code>pip install spacy</code> but I'm getting the following error ..</p>
  
  <p><a href="https://i.stack.imgur.com/z2W1Y.png" rel="noreferrer"><img src="https://i.stack.imgur.com/z2W1Y.png" alt="enter image description here"></a></p>
  
  <p>I have VS 2015 installed, and I have the following Python install ..</p>
  
  <p><code>3.5.2 |Anaconda 2.5.0 (64-bit)| (default, Jul  5 2016, 11:41:13) [MSC v.1900 64 bit (AMD64)]</code></p>
  
  <p>I tried the following SO solutions to no avail ..</p>
  
  <ul>
  <li><a href="https://stackoverflow.com/questions/41672714/command-cl-exe-failed-upon-pip-install-django-compressor">command cl.exe failed upon pip install django_compressor</a></li>
  <li><a href="https://stackoverflow.com/questions/38059732/error-command-cl-exe-failed-no-such-file-or-directory">error: command &#39;cl.exe&#39; failed: No such file or directory</a></li>
  </ul>
  
  <p>As well as various others. This is not a unique problem to this specific library but more generally anytime I try to install Python libraries that need C to build on Windows.</p>