system ntpd starting when I have pkgsrc ntpd installed?

[Carl Brewer <carl%bl.echidna.id.au@localhost>]

G'day,

On bootup on a NetBSD 5.2 (amd64) box of mine the original system ntpd 
starts (which is vulnerable to a DoS attack) :

bash-4.3# ps -auxww | grep ntp
root     269  0.2  0.1  11324   5424 ?      Ss    3:44AM 4:19.12 
/usr/sbin/ntpd

bash-4.3# kill -TERM 269

bash-4.3# /etc/rc.d/ntpd start
Starting ntpd.

bash-4.3# !ps
ps -auxww | grep ntp
root    1969  0.0  0.2  11340   7288 ?      Ss    6:42AM 0:00.01 
/usr/pkg/sbin/ntpd

I've grepped through /etc for ntpd and can't find any references to 
/usr/sbin/ntpd anywhere - I replaced /etc/rc.d/ntpd with the one from 
pkgsrc when I replaced ntpd with the pkgsrc one (and, as above, when I 
run /etc/rc.d/ntpd by hand it does the right thing!).

"help"!

Carl