{
  pkgs,
  service_configs,
  lib,
  username,
  config,
  serviceMountDeps,
  ...
}:
{
  imports = [
    (serviceMountDeps "minecraft-server-${service_configs.minecraft.server_name}" [
      "${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}"
    ])
  ];

  environment.systemPackages = [
    (pkgs.writeScriptBin "mc-console" ''
      #!/bin/sh
      ${pkgs.tmux}/bin/tmux -S /run/minecraft/${service_configs.minecraft.server_name}.sock attach
    '')
  ];

  nixpkgs.config.allowUnfreePredicate =
    pkg:
    builtins.elem (lib.getName pkg) [
      "minecraft-server"
    ];

  services.minecraft-servers = {
    enable = true;
    eula = true;
    dataDir = service_configs.minecraft.parent_dir;
    openFirewall = true;

    servers.${service_configs.minecraft.server_name} = {
      enable = true;
      package = pkgs.fabricServers.fabric-1_21_5;

      jvmOpts =
        let
          heap_size = "4000M";
        in
        "-Xmx${heap_size} -Xms${heap_size} -XX:+UseZGC -XX:+ZGenerational";

      serverProperties = {
        server-port = 25565;
        enforce-whitelist = true;
        gamemode = "survival";
        white-list = true;
        difficulty = "easy";
        motd = "A Minecraft Server";
        view-distance = 12;
      };

      whitelist = import ../secrets/minecraft-whitelist.nix;

      symlinks = {
        "mods" = pkgs.linkFarmFromDrvs "mods" (
          with pkgs;
          builtins.attrValues {
            FabricApi = fetchurl {
              url = "https://cdn.modrinth.com/data/P7dR8mSH/versions/ZOyJh09R/fabric-api-0.120.0%2B1.21.5.jar";
              sha512 = "a4db4ae64f6590c69e5b86fdd6e89c66e8f3160d57dfa4369ea64fdc9bfb1f3812c2ed8ffdddca43c01d3335aaf404b283f5761b42ecc5389cd1ca206e6f500e";
            };

            FerriteCore = fetchurl {
              url = "https://cdn.modrinth.com/data/uXXizFIs/versions/CtMpt7Jr/ferritecore-8.0.0-fabric.jar";
              sha512 = "131b82d1d366f0966435bfcb38c362d604d68ecf30c106d31a6261bfc868ca3a82425bb3faebaa2e5ea17d8eed5c92843810eb2df4790f2f8b1e6c1bdc9b7745";
            };

            Lithium = fetchurl {
              url = "https://cdn.modrinth.com/data/gvQqBUqZ/versions/VWYoZjBF/lithium-fabric-0.16.2%2Bmc1.21.5.jar";
              sha512 = "09a68051504bb16069dd6af8901f2bbeadfd08ad5353d8bcc0c4784e814fb293d9197b4fb0a8393be1f2db003cd987a9e4b98391bbe18c50ae181dace20c2fa4";
            };

            NoChatReports = fetchurl {
              url = "https://cdn.modrinth.com/data/qQyHxfxd/versions/CHlHxkvf/NoChatReports-FABRIC-1.21.5-v2.12.0.jar";
              sha512 = "c0825db25672cf8b50face51ec8a6bedb4be50b374a2537640a433c98817bc07c177485e93ab8cee9e3f7bfb1d2eb1460309e818b411764c92426b552487a9f7";
            };

            # waiting for 1.21.5 version:
            # https://github.com/Tuinity/Moonrise/tree/mc/1.21.5
            # moonrise = fetchurl {
            #   url = "https://cdn.modrinth.com/data/KOHu7RCS/versions/6Dgh9jQx/Moonrise-Fabric-0.2.0-beta.9%2Bac0c7de.jar";
            #   sha512 = "c101f1a41db4095d651d32eae47bd7e6f7358f7390898610d1bf261ebfc7e0f4165fd551c08a99cca31a3308f1989a16b8c75c1ece60ef9cd475107ca4f4219e";
            # };

            # doesn't support 1.21.5:
            # https://github.com/jpenilla/squaremap/issues/386
            # https://github.com/jpenilla/squaremap/pull/387
            # squaremap = fetchurl {
            #   url = "https://cdn.modrinth.com/data/PFb7ZqK6/versions/9i2KwI5R/squaremap-fabric-mc1.21.4-1.3.4.jar";
            #   sha512 = "6eb44061f057d1bbd0bb6f9186d03d496479dcd953af8f09f70099c2e67e567e5dca626972d45af0315c2e2714c3dd74beef97575396e3bb90b7c670f5c80fef";
            # };

            # doesn't support 1.21.5
            # modernfix = fetchurl {
            #   url = "https://cdn.modrinth.com/data/nmDcB62a/versions/ZGxQddYr/modernfix-fabric-5.20.3%2Bmc1.21.4.jar";
            #   sha512 = "ae49114c92a048c9ce79e197fc4df028e186cf13546e710f72247382fa8076f0b70d6aa3224951f4a36c886ca236f099a011f20b021a2b0d1a75c631da4d7d52";
            # };

            alternatecurrent = fetchurl {
              url = "https://cdn.modrinth.com/data/r0v8vy1s/versions/eTNKfjl1/alternate-current-mc1.21.5-1.9.0.jar";
              sha512 = "3e4088170917846b30275825420b553e3fc3befb52bb259848853b93343bae3b39cd592902c0c79f05b17381d80170784990d9c4e110ff3b6c552e5508b40d67";
            };

            # fix `Error sending packet clientbound/minecraft:disconnect` error
            disconnectpacketfix = fetchurl {
              url = "https://cdn.modrinth.com/data/rd9rKuJT/versions/Gv74xveQ/disconnect-packet-fix-fabric-2.0.0.jar";
              sha512 = "1fd6f09a41ce36284e1a8e9def53f3f6834d7201e69e54e24933be56445ba569fbc26278f28300d36926ba92db6f4f9c0ae245d23576aaa790530345587316db";
            };

            krypton = fetchurl {
              url = "https://cdn.modrinth.com/data/fQEb0iXm/versions/neW85eWt/krypton-0.2.9.jar";
              sha512 = "2e2304b1b17ecf95783aee92e26e54c9bfad325c7dfcd14deebf9891266eb2933db00ff77885caa083faa96f09c551eb56f93cf73b357789cb31edad4939ffeb";
            };
          }
        );
      };
    };
  };

  services.caddy.virtualHosts."map.${service_configs.https.domain}".extraConfig = ''
    root * ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}/squaremap/web
    file_server browse
  '';

  users.users.${config.services.caddy.user}.extraGroups = [
    # for `map.gardling.com`
    "minecraft"
  ];

  systemd.tmpfiles.rules = [
    "d ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name} 0750 minecraft minecraft"
  ];

  users.users.${username}.extraGroups = [
    "minecraft"
  ];
}