# file /tmp/perl/siteconfig.pm
print "loaded " . __FILE__ . " from $INC[0]\n";
shift @INC; # done with files in /tmp/perl
1;

##</code><code>##

qwurx [shmem] ~> env PERL5OPT='-I/tmp/perl -Msiteconfig' perl -e 1
loaded /tmp/perl/siteconfig.pm from /tmp/perl