title: Can`t install libpq-dev
body: <p>I am trying to install libpq-dev as postgres requires it, but I only get an error.</p>
  
  <pre><code>pip install libpq-dev==9.4.3
  
  Could not find a version that satisfies the requirement libpq-dev==9.4.3 (from versions: )
  No matching distribution found for libpq-dev==9.4.3
  </code></pre>