> > "Recommended" way is "make update".
> > 
> >   $ cd /usr/pkgsrc/graphics/freetype
> >   $ make update
> > 
> > does all the difficulties.
> 
> Yes I can do that on my source machine, but what about machines that are
> binary only, isn't that a large part of the point with the package system?

Binary packges consist of package information (/var/db/pkg/foo/*) and
package files (/usr/pkg/...), which don't have dependency infomation
for updating, that for deleting exist though. (+REQUIRED_BY)

And NetBSD doesn't provide a way to consult pkgsrc infomations
(e.g. distfiles, package dependencies, ...) remotely which Red Hat and
Debian may provide.

So I think that you have to have /usr/pkgsrc localy to use "update"
packages, or you have to do it manually.

I may be wrong. Any correction welcomed.

Masao