>> I would like to create pkgsrc packages for some of NetBSD user space 
 >> utilities.

> Sounds fine.
Examples:

wip/heirloom-awk
wip/heirloom-grep
wip/heirloom-sed
wip/heirloom-sort
wip/heirloom-tar
wip/heirloom-tsort
wip/heirloom-xargs

wip/heirloom-toolchest

The work is not finished yet, but I hope idea is clear.
I would like to see the same for some NetBSD utilities
versioned by NetBSD release.

-- 
Best regards, Aleksey Cheusov.