Perl and GHC are the two packages I've had the most problems with as well. Some other languages seem to have a foo_select package which will allow you to switc

Perl and GHC are the two packages I've had the most problems with as well. Some other languages seem to have a foo_select package which will allow you to switch the primary version, but 'perl5' seems fixed at 5.8.something, which is pretty horrible. There's a ticket with a lot of activity at http://trac.macports.org/ticket/16830 http://trac.macports.org/ticket/16830 but afaik there's still no easy way to stop it trying to rip out your new perl 5.10 without manually fixing deps everywhere. GHC I just installed from a binary package :-)