Can't install ruby-bdb on RELEASE-6.1

[Jim Trigg]

I'm setting up a new system with 6.1-RELEASE, and I forgot to install
portupgrade from a package during the OS install.  ruby-bdb fails to
build, complaining that it doesn't know how to make 'all' (it doesn't
specify which directory it's in, but it's right after it runs
extconf.rb).  Any clues?

(Note: when I posted this earlier I mentioned changing LOCALBASE.  Further
testing has shown that it fails regardless of LOCALBASE setting.)

Thanks,
Jim