#!/usr/bin/perl -wl
use strict;

BEGIN { print for @INC; print "-----" }
use lib "/usr/share/perl5/vendor_perl/AnyEvent/Iml", "/foo/bar";
BEGIN { print for @INC; print "-----" }

# use here whatever module lives in one of the added paths...

##</code><code>##

$ ./955116.pl
/etc/perl
/usr/local/lib/perl/5.12.4
/usr/local/share/perl/5.12.4
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.12
/usr/share/perl/5.12
/usr/local/lib/site_perl
.
-----
/usr/share/perl5/vendor_perl/AnyEvent/Iml
/foo/bar
/etc/perl
/usr/local/lib/perl/5.12.4
/usr/local/share/perl/5.12.4
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.12
/usr/share/perl/5.12
/usr/local/lib/site_perl
.
-----

##</code><code>##

<p> inserting into the script: </p>
<c>
use lib "/usr/share/perl5/vendor_perl/AnyEvent/Iml";
</c>
<p> also does not change the entry. </p>

##</code><code>##

use lib "/usr/share/perl5/vendor_perl/AnyEvent/Iml";