BEGIN {
    my $varName  = 'SOME_VAR';
    my $varValue = 123;

    require Exporter;
    $INC{"Somepackage.pm"} = 1;
    package Somepackage;

    our @ISA = qw(Exporter);
    our @EXPORT_OK = $varName;
 
    no strict 'refs';
    $$varName = $varValue;
}