base lua vs. pkgsrc lua

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Hi!

I notice there's a perfectly fine lua interpreter in base now, but
pkgsrc can't accept it as a replacement for lang/lua because it
doesn't look in /usr/pkg/lib/lua/5.1.

Can someone please explain the rationale for this decision?

Thanks,
 Thomas