Trying to build current I get:

===> usr.sbin/netgroup_mkdb 
cc -O  -Werror  -c netgroup_mkdb.c
cc -O  -Werror  -c util.c
cc -O  -Werror  -c str.c
cc   -o netgroup_mkdb netgroup_mkdb.o util.o str.o
netgroup_mkdb.o: Undefined symbol `__ng_sl_find' referenced from text segment 
netgroup_mkdb.o: Undefined symbol `__ng_sl_add' referenced from text segment
netgroup_mkdb.o: Undefined symbol `__ng_sl_init' referenced from text segment
netgroup_mkdb.o: Undefined symbol `__ng_sl_free' referenced from text segment
*** Error code 1

what am I doing wrong?

TIA,
Paul