Makes sense.

I see that neither NDBM_File nor DB_File are installed on the HP-UX hosts. From there, I'm willing to assume that none of the others are, either.

Looks like this is going to spin off yet another project, as attempting to install DB_File failed on account of not having gcc available... Time to see whether it would be easier to make CPAN work with a plain ANSI cc or to convince TPTB to authorize installing gcc. What fun.