use Nix;

sub findBuildDependencyInQueue {
    my ($build) = @_;
    my $drvpath = $build->drvpath;
    my @paths = reverse(split '\n', `nix-store -qR $drvpath`);
    
    foreach my $path (@paths) {
        if($path ne $drvpath) {
            (my $depBuild) = $db->resultset('Builds')->search(
                 { drvpath => $path, finished => 0, busy => 0, enabled => 1, disabled => 0 },
                 { join => ['schedulingInfo', 'project'], rows => 1 } ) ;
            return $depBuild if defined $depBuild;
        }
    }    
    return $build ;           
}

                $build = findBuildDependencyInQueue($build);