or download this
$ perldoc cpan |ack "[-][fiT]"
-f Force the specified action, when it normally would have failed
+. Use
option, -i is not optional for installing a module when you ne
+ed to
...
# force install modules ( must use -i )
cpan -fi CGI::Minimal URI
Japheth Cleaver added the bits to allow a forced install (-f).