how do I tell ports that perl5.8 should never be installed?

[Randal L. Schwartz]

I've upgraded to Perl 5.10, but when I tried to install a few
things that depended on "perl", the package installed perl5.8, because
that must be what it was compiled with.

How do I tell the ports system that perl5.8 should *never* be used, and rather
than install a package that needs it, I can fall back to a port build?

I'm using portsnap to update things, so I don't think i can just delete the
5.8 port, because it will likely just get reinstalled.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
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