I have yet to find a version of make for dos that likes the standard perl makefiles. Generally the best and only wy to install code is via a package manager. In dos you have two options:

ppm install dbi

perl -MCPAN -e shell

Ad then typing 'install DBI'. With this second version you will find you will probably have to configure the CPAN interface first.

$japh->{'Caillte'} = $me;