Ionic iOS build fails, error archive not found

Question

Currently cordova-ios is not compatible with Xcode 10

You can try to disable the new build system that Xcode 10 uses and use the old one by adding this to your build.json file

"buildFlag": [
  "-UseModernBuildSystem=0"
]

or adding --buildFlag="-UseModernBuildSystem=0" to the build command

The full command should be cordova build ios --buildFlag="-UseModernBuildSystem=0".

Or for Ionic ionic cordova build ios -- --buildFlag="-UseModernBuildSystem=0"