title: Build error Xcode 10 - Multiple commands produce
body: <p>I just upgraded to Xcode 10, and I suddenly face this error when I try to build, any ideas how to fix it? I tried cleaning derived data, but without any luck.</p>
  
  <p><a href="https://i.stack.imgur.com/WpP5F.png" rel="noreferrer"><img src="https://i.stack.imgur.com/WpP5F.png" alt="enter image description here"></a></p>