title: How do I install the latest version of Next.js with Yarn?
body: <pre><code>$ yarn add https://github.com/zeit/next.js.git
  yarn add v1.7.0
  [1/4]   Resolving packages...
  error Can't add "nextjs-project": invalid package version undefined.
  info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
  </code></pre>
  
  <p>I want the latest code, but for some reason it's not installing.</p>