title: node-gyp errors on "Cannot find module" on Windows
body: <p>I'm trying to build Atom. When I run <code>npm install</code>,  I get an error:</p>
  
  <pre class="lang-none prettyprint-override"><code>Error: Cannot find module 'C:\Program Files (x86)\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js'
  </code></pre>
  
  <p>I'm on Windows. How can I fix this?</p>