When building SDK installers on x64 or x86, the apphost from arm64 and x86/x64 (alternate arch) are included. This won't be possible to do as-is in the VMR build, as those are built in different legs. This will require a build at the join point. There is some conjecture these can simply be removed, as they are for C++/CLI support when C++/CLI didn't support PackageReferences.