sub null {
            my ($s) = @_;
            return $s eq "" ? undef : $s;
        }

            , description => $buildInfo->{description}
            , license => $buildInfo->{license}
            , homepage => $buildInfo->{homepage}
            , maintainers => $buildInfo->{maintainers}

            , description => null($buildInfo->{description})
            , license => null($buildInfo->{license})
            , homepage => null($buildInfo->{homepage})
            , maintainers => null($buildInfo->{maintainers})