creating watchOS2 simulator build using xcodebuild

I would like to build a simulator build using Terminal and xcodebuild. Up until now passing something similar like "-sdk iphonesimulator9.0" worked. Now that the watch extension is running on the watch I receive this error :

=== BUILD TARGET appName WatchKit Extension OF PROJECT appName WITH CONFIGURATION Debug === Check dependencies target specifies product type 'com.apple.product-type.watchkit2-extension', but there's no such product type for the 'iphonesimulator' platform

Do you know how can someone build simulator version of their app which has watchOS2 support?

Thanks!