>type v1\AA.pm

package AA;

our $VERSION = 1.0;

1;

>type v2\AA.pm

package AA;

our $VERSION = 2.0;

1;

>type test.pl

use lib qw( v1 v2 );

use AA 2;

>perl test.pl
AA version 2 required--this is only version 1 at test.pl line 4.
BEGIN failed--compilation aborted at test.pl line 4.