why is perl being built even though port is installed and properly set in make.conf?

[Tomaz Borstnar <tomaz.borstnar@xxxxxxxx>]

Hello!

	I installed perl 5.8.2 from ports which also properly note the fact in 
make.conf:

# -- use.perl generated deltas -- #
# Created: Mon Mar 22 15:19:33 2004
# Setting to use base perl from ports:
PERL_VER=5.8.2
PERL_VERSION=5.8.2
PERL_ARCH=mach
NOPERL=yo
NO_PERL=yo
NO_PERL_WRAPPER=yo

Yet right now perl is being built while doing make buildworld... 
Considering that perl is no longer being used for building kernel it 
could skip this part, right? Not to mention make.conf entries, of course.

Tomaž