title: node-sass installation issue
body: <p>When I try to install node-sass using npm, I get the following error message:</p>
  
  <blockquote>
    <p>Cannot download "<a href="https://github.com/sass/node-sass/releases/download/v3.13.1/win32-x64-57_binding.node" rel="noreferrer">https://github.com/sass/node-sass/releases/download/v3.13.1/win32-x64-57_binding.node</a>":"</p>
  </blockquote>
  
  <p>The command I use is:</p>
  
  <pre><code>npm install node-sass --save-dev-
  </code></pre>
  
  <p>You can see more details in the screenshot below:</p>
  
  <p><img src="https://i.stack.imgur.com/fCzyj.png" alt="installation process"></p>