This content is part of a third party extension that is not supported by the Cake project.
For more information about this extension see Cake.Xamarin.
Summary
Creates an IPA archive of an iOS Appof an app with MDTool
Change your project settings to output an IPA file, and use the MSBuild to build.
See documentation for more info: https://developer.xamarin.com/guides/ios/deployment,_testing,_and_metrics/app_distribution/ipa_support/#Building_via_the_Command_Line_On_Mac