my @dirs = (
    "/path1",
    "/path2",...
);

foreach my $dir (@dirs) {
    next unless -d $dir;
    my $kidpid = fork();
    if($kidpid == 0){
        # Child here
        my @makelists = `find $dir -name .makelist`;
        foreach my $file (@makelists) {
            if (-e "$dir/$file") {
                ProcessMakeList($file);
            } else {
                print "bad $file\n";
            }
        }
        exit 0;
    }
}