What does it mean when lintpkgsrc -i complains like this?  How do I get
rid of it?

Scanning pkgsrc Makefiles: .....................Cannot extract
thunderbird-bin-UNDEFINED version
(/usr/pkgsrc/mail/thunderbird-bin/Makefile)
4500 packages
[snipped usual version mismatch stuff]


-- 
David Griffith
dgriffi@cs.csubak.edu