title: Update system version of node with nvm
body: <p>I usually do not have any issues with <code>nvm</code>, but a React Native / Xcode project is failing to build because it's trying to use Node v4.4.3.</p>
  
  <p>My <code>nvm ls</code> looks like this:</p>
  
  <pre><code>   v5.11.0
     v5.11.1
     v6.1.0
     v6.9.5
     v6.11.5
  -&gt; v8.7.0
     v10.1.0
     system
  </code></pre>
  
  <p>When I type <code>nvm use system</code> and <code>node -v</code> it prints <code>4.4.3</code>, so I suppose that's where Xcode is getting <code>4.4.3</code> from. </p>
  
  <p>But when I type <code>nvm alias system 8.7.0</code> (attempting to alias the system to 8.7.0), it prints <code>system -&gt; 8.7.0 (-&gt; v8.7.0)</code> and <code>node -v</code> still returns <code>4.4.3</code>.
  I also tried <code>nvm install 8.7.0 --reinstall-packages-from=node</code>, but that didn't really seem to do anything to help the cause.</p>
  
  <p>I probably had node installed with <code>brew</code> at one point, but believe I've installed it because <code>brew node -v</code> returns <code>Error: Unknown command: node Error: Kernel.exit</code>.</p>
  
  <p>Wondering if anyone can point me in the correct direction!</p>