title: Yarn install production dependencies of a single package in workspace
body: <p>I'm trying to install the production dependencies only for a single package in my workspace. Is that possible?</p>
  
  <p>I've already tried this:</p>
  
  <p><code>yarn workspace my-package-in-workspace install -- --prod</code></p>
  
  <p>But it is installing all production dependencies of all my packages.</p>