>>>>> James K Lowden writes:

James> I think I have a plausible plan for making pkgsrc upgrades
James> easier and less hair-raising.

[...]

James> 	mv /usr/pkg /usr/pkg.old
James> 	mv /usr/pkg.new /usr/pkg

This functionality already exists, just use pkgsrc/mk/bulk/mksandbox.

That script is God's gift to pkgsrc users. It is absolutely wonderful! ;-)

Kind regards,

        -- Urban