title: Why does Yarn say "Found incompatible module" when the version is correct?
body: <p>When I run <code>yarn</code>, I receive the following error:</p>
  
  <pre><code>yarn install v0.16.1
  [1/4] Resolving packages...
  [2/4] Fetching packages...
  error recursive-iterator@2.0.1: The engine "node" is incompatible with this module. Expected version "&gt;=6.0.0".
  error Found incompatible module
  info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
  </code></pre>
  
  <p>However, the version of Node that I have installed is <code>v6.9.2-pre</code>, which seems to be correct for the version range. Any ideas why I get this error?</p>