{ pkgs, config, lib, access, gensokyo-zone, ... }: let
  inherit (gensokyo-zone) systems;
  inherit (lib.attrsets) filterAttrs mapAttrsToList attrNames;
  promtailSystems = filterAttrs (_: system:
    system.config.exporters.promtail.enable or false
  ) systems;
    inherit (builtins) toJSON;
    inherit (lib.options) mkOption;
    inherit (lib.types) port;
    cfg = config.services.loki;
in {
    options.services.loki.settings = {
        httpListenPort = mkOption {
            type = port;
            description = "Port to listen on over HTTP";
            default = 9093;
        };
        grpcListenPort = mkOption {
            type = port;
            description = "Port to listen on over gRPC";
            default = 0;
        };
   };
    config = {
        services.loki = {
            #enable = true;
            configFile = pkgs.writeTextFile {
                name = "config.yaml";
                executable = false;
                text = (toJSON {
                    server = {
                        http_listen_port = cfg.settings.httpListenPort;
                        grpc_listen_port = cfg.settings.grpcListenPort;
                    };
                    positions = {
                        filename = "/tmp/positions.yaml";
                    };
                    clients = mapAttrsToList (system: systemConfig: {
                            url = "${access.getAddressFor system.config.name "local"}:${system.config.exporters.promtail.port}";
                    }) promtailSystems;
                    scrape_configs = mapAttrsToList (system: systemConfig: {
                        job_name = "${system.config.name}-journal";
                        journal = {
                            max_age = "${24*7}h";
                            labels = {
                                job = "systemd-journal";
                                host = system.config.name;
                            };
                        };
                        relabel_configs = [
                            {
                                source_labels = [ "__journal__systemd_unit" ];
                                target_label = "unit";
                            }
                        ];
                   }) promtailSystems;
                });
            };
        };
    };
}