I've been lurking around ftp.netbsd.org, and tell me if I have this
right:
all changes to the current package collection goes to 'pkgsrc' kept in
/pub/NetBSD/NetBSD-current/pkgsrc. Then, every quarter, pkgsrc is
archived in pkgsrc-2005-Q1 (or whatever) and _doesn't change_ again;
meaning its safe for people with slower machines  (who doesn't want to
build big packages ourselves) to install binary packages from
/pub/NetBSD/packages/pkgsrc-2005Q1/NetBSD-2.0/i386 without worrying
about conflicts/etc.
Tom
-- 
  
  eyefull@eml.cc