http://www.perlmonks.org?node_id=486113


in reply to Re^3: How to change @INC permanently?
in thread How to change @INC permanently?

set the PERL5LIB environment variable
In my experience, ensuring that an environment variable is set for every possible process that might execute my script is pretty unlikely, not to mention that a setuid script ignores that variable.

-- Randal L. Schwartz, Perl hacker
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In Section Seekers of Perl Wisdom