Show HN: Nightmare – Simple browser automation
I use Ubuntu Linux, and I've got PhantomJS installed. Whether I use Nightmare, Nightmarejs, or Phantomjs on the command line this is what I get:  
ReferenceError: Can't find variable: Nightmare<p><pre><code>  nightmare.js:1
  </code></pre>
Should there be more instructions for installing? I believe the brew command is something for Mac users only...