use strict;
use warnings;
use File::Copy qw();
if (-f "Collate.xsX") {
    print STDERR "Enabling XS in sources...\n";
    die "***** Failed, sources could be inconsistent! *****\n"
     unless File::Copy::move('MANIFEST',        'MANIFEST.N')
        and File::Copy::move('MANIFEST.X',      'MANIFEST')
        and File::Copy::move('Collate.pm',      'Collate.pmN')
        and File::Copy::move('Collate.xsX',     'Collate.xs')
        and File::Copy::move('Collate.pmX',     'Collate.pm');
}