if (!-l $link) {
        symlink($path, $link)
            or die "cannot create GC root `$link' to `$path'";
    }

    open ROOT, ">$link" or die "cannot create GC root `$link' to `$path'";
    close ROOT;

    push @actual_roots, readlink "$gcRootsDir/$link";

    push @actual_roots, $Nix::Config::storeDir . "/" . $link;

	my $st = lstat("$gcRootsDir/$link");
	if (!defined $st) {

        my $st = lstat("$gcRootsDir/$link");
        if (!defined $st) {

	} elsif ($st->ctime < $now - 24 * 60 * 60) {

        } elsif ($st->ctime < $now - 24 * 60 * 60) {