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