Create pkg from visual studio for windows?

Currently I'm having an iOS, Andoid and WPF applications.

I use a Windows machine that is connected to a Mac to build their artifacts (ipa,apk,exe).

When I add a Mac application to the build, without checking the option to create a package, the build passes. Otherwise it fails with a compilation error.

If I can build the Mac application from a Windows device successfully, why can't I create a package as well? Is it a local bug or not yet supported? Will it be supported if so and when?

Thanks.