error Failed to build iOS project. We ran “xcodebuild” command but it exited with error code 65

Removing duplicate font files in Copy Bundle Resources worked for me.

The problem seems to be caused by the new autolinking feature in React Native 0.60 — the line use_native_modules! in ios/Podfile means when you do pod install, any pods found in node_modules are automatically linked. This means that links to all font files are added to [CP] Copy Pods Resources when you do pod install.

If you previously installed react-native-vector-icons manually by adding the font files to Copy Bundle Resources, you then get a "Multiple commands produce..." fatal build error.

So to fix the problem, just remove the font files from Copy Bundle Resources, so that they are only in [CP] Copy Pods Resources.