http://www.perlmonks.org?node_id=190621


in reply to Re: Compiling Perl with correct values in @INC
in thread Compiling Perl with correct values in @INC

Which actually works quite well using mod_perl: 
<Perl>
use lib "/my/modules/path";
</Perl>

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As a note, you have to build that thing properly when compiling it in:
% perl Makefile.PL EVERYTHING=1

In Section Seekers of Perl Wisdom