rev = 24765;
      sha256 = "12ah8c8p9bx55hd17lhcfc74bd4r1677dxy0id3008pww1aklir7";

      rev = 24774;
      sha256 = "1akj695gpnbrjlnwd1gdnnnk7ppvpp1qsinjn04az7q6hjqzbm6p";

    isValidPath queryPathInfo

    isValidPath

sub queryPathInfo {
    my $path = shift;
    my $hash = Nix::queryPathHash($path);
    my $deriver = Nix::queryDeriver($path);
    my @refs = Nix::queryReferences($path);
    return ($hash, $deriver, \@refs);
}

        my ($hash, $deriver, $refs) = queryPathInfo $path;

        my ($deriver, $hash, $time, $narSize, $refs) = Nix::queryPathInfo $path;

            ($narSize != 0 ? "  NarSize: $narSize\n" : "") .

sub getSize {
    my $size = `du -bcs @_ 2> /dev/null | tail -1 | cut -f 1 `;
    return int($size);
}

        my $cmd = "nix-store --realise $drvPath " .

        my $cmd = "nix-store -j1 --no-build-hook --realise $drvPath " .

    my $logsize = defined $logfile ? getSize($logfile) : 0;
    my $size = isValidPath($outPath) ? getSize($outPath) : 0;

    my $logsize = defined $logfile ? stat($logfile)->size : 0;

    my $size = 0;

        (my $hash, my $deriver, my $refs) = queryPathInfo($outPath) ;
        $closuresize = getSize(@{$refs});

        my ($deriver, $hash, $time, $narSize, $refs) = Nix::queryPathInfo($outPath);
        $size = $narSize;
        my @closure = Nix::computeFSClosure(0, 0, $outPath);
        foreach my $path (@closure) {
	    my ($deriver, $hash, $time, $narSize, $refs) = Nix::queryPathInfo($path);
 	    $closuresize += $narSize;    
        }