Parallel make cleandir fails if I try to use -j8 or -j32:

--- cleandir-libisccc ---
rm -f a.out [Ee]rrs mklog core *.core  
--- cleandir-share ---
rm -f gt.cat4 intro.cat4
--- cleandir-sys ---
--- cleandir ---
--- cleandir-libexec ---
cleandir ===> libexec/rpc.rusersd
--- cleandir-regress ---
rm -f .depend kill1.d /home/rpaulo/netbsd/src/regress/lib/libpthread/kill1/tags 
--- cleandir-usr.sbin ---
--- cleandir-libbind9 ---
rm -f libbind9_p.a 
--- cleandir-sys ---
getcwd() failed: No such file or directory <------- XXXX
*** [cleandir] Error code 2
--- cleandir-gnu ---
--- cleanprog ---
--- cleandir-regress ---
--- cleandir-libc ---
--- cleandir ---
--- cleandir-usr.sbin ---
--- cleandir-libdns ---
rm -f libdns_p.a 
--- cleandir-usr.bin ---
--- cleanprog ---
--- cleandir-games ---
A failure has been detected in another branch of the parallel make
--- cleandir-share ---
--- cleandir-man8 ---
A failure has been detected in another branch of the parallel make

Is this problem known ?
-- 
  Rui Paulo			<rpaulo@{NetBSD{,-PT}.org,fnop.net}>