In Windows, Perl checks the shebang line for options.

>type script.pl
#!perl -Imoo
$,=", ";
$\="\n";
print @INC;

>perl script.pl
r:/Utils/perl/lib, r:/Utils/perl/site/lib, ., moo
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-I... adds to the end @INC.
-Mlib=... adds to the front of @INC. (better)