-# I doubt that the makefile way will work with ndp, so filter it out and use
-# a rule below to call build.library.ndp instead
-$(foreach SUBDIR,$(filter-out ndp,$(SUBDIRS)),make.library.$(SUBDIR)):\
+# Packages in $(SUBDIRS_BUILD) need to use the build.* rules instead of
+# make.*, so filter them out and use an alternate rule below instead.
+$(foreach SUBDIR,$(filter-out $(SUBDIRS_BUILD),$(SUBDIRS)),make.library.$(SUBDIR)):\