in reply to Creating a pseudo-module/package on a remote (CGI) server?

You also could use 
use FindBin qw/ $RealBin /;
use lib "$RealBin/lib";

[download]
or 
use FindBin qw/ $RealBin /;
use lib "$RealBin/../lib";

[download]
depending on your directory layout.
See also FindBin
HTH
--
cub.uanic

In Section Seekers of Perl Wisdom