Adding NetBeans sources as NetBeans platform

[Boris Heithecker]

Hi all,
in NetBeans 11.1 IDE, I can't add the sources (nbbuild/netbeans) as a
NetBeans platform. The build folder is recognized as a platform, but after
running ant build-nozip only a small and varying number of modules is
detected - sometimes one, sometime none at all. Is there anything I need to
know?
Boris