I have to admit that following the MESSAGE in the package
is not sufficient to make the password check work on
NetBSD.
There was a change in gnome-screensaver which makes that
privileges (gained through SUID) are dropped after
initialisation of the password dialog. PAM on NetBSD
does (unlike Linux's) not work with user privileges.
So the only way I see to make it work on NetBSD is to
desist from use of PAM. This can be done with a "configure"
argument. I'll change the pkg accordingly later.

sorry for the confusion
Matthias