title: pip finds package with search but won't install it
body: <p>When I run <code>pip search linkchecker</code> I get</p>
  
  <pre><code>linkchecker               - check websites and HTML documents for broken links
  </code></pre>
  
  <p>But when I try <code>pip install linkchecker</code> I get</p>
  
  <pre><code>  Could not find any downloads that satisfy the requirement linkchecker
  </code></pre>
  
  <p>What am i doing wrong?</p>