std::multimap<Path, Build::ptr> newBuilds;

    std::vector<BuildID> newIDs;
    std::map<BuildID, Build::ptr> newBuildsByID;
    std::multimap<Path, BuildID> newBuildsByPath;

        auto res = txn.parameterized("select id, project, jobset, job, drvPath, maxsilent, timeout, timestamp, globalPriority from Builds where id > $1 and finished = 0 order by id")(lastBuildId).exec();

        auto res = txn.parameterized
            ("select id, project, jobset, job, drvPath, maxsilent, timeout, timestamp, globalPriority from Builds "
             "where id > $1 and finished = 0 order by globalPriority desc, id")
            (lastBuildId).exec();

            newBuilds.emplace(std::make_pair(build->drvPath, build));

            newIDs.push_back(id);
            newBuildsByID[id] = build;
            newBuildsByPath.emplace(std::make_pair(build->drvPath, id));

        newBuildsByID.erase(build->id);

            while (true) {
                auto i = newBuilds.find(r->drvPath);
                if (i == newBuilds.end()) break;
                Build::ptr b = i->second;
                newBuilds.erase(i);
                createBuild(b);
            }

            auto i = newBuildsByPath.find(r->drvPath);
            if (i == newBuildsByPath.end()) continue;
            auto j = newBuildsByID.find(i->second);
            if (j == newBuildsByID.end()) continue;
            createBuild(j->second);

    while (!newBuilds.empty()) {
        auto build = newBuilds.begin()->second;
        newBuilds.erase(newBuilds.begin());

    for (auto id : newIDs) {
        auto i = newBuildsByID.find(id);
        if (i == newBuildsByID.end()) continue;
        auto build = i->second;