The option UNINST=1 is mentioned (but not defaulted) during initial cpan configuration. This option removes any other copies of the modules that exist in any of the multiple valid directories modules can be installed in. The option is probably safe to turn on permenantly in most situations.

To update it just type on the cpan prompt:
cpan> o conf make_install_arg UNINST=1
This will pass it to make from that point onwards.

In reply to Re: upgrading Tk && CPAN.pm by repson
in thread upgrading Tk && CPAN.pm by Jouke

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