title: Why won't Yarn run scripts from the package.json?
body: <p>My npm scripts are not working with Yarn.</p>
  
  <p>Normally I would run <code>npm start</code> or <code>npm run build</code>and the scripts would execute successfully. When I try and run these with <code>yarn start</code> / <code>yarn run start</code> / <code>yarn run build</code> I get errors:</p>
  
  <pre><code>yarn start v0.15.1
  $ "node server" 
  sh: node server: command not found
  error Command failed with exit code 127.
  </code></pre>
  
  <p>I installed Yarn globally through npm. Running zsh in terminal.</p>
  
  <p><strong>Update:</strong> Looks like this was a v0.15.1 bug and is no longer an issue in 0.16.* </p>