perl Makefile.PL PREFIX=<mydir>
make && make install

##</code><code>##

export PERL5LIB=$PERL5LIB:<mydir>/lib:<mydir>/lib/site_perl

OR

setenv PERL5LIB $PERL5LIB:<mydir>/lib:<mydir>/lib/site_perl

##</code><code>##

$ENV{PERL5LIB}=$ENV{PERL5LIB}::<mydir>/lib:<mydir>/lib/site_perl

use Digest::MD5 ;