{
  pkgs,
  pkgs-unstable,
  ...
}: {
  services.minecraft-server = {
    enable = true;
    package = pkgs-unstable.minecraft-server; # use latest version only!
    declarative = true;

    eula = true;

    openFirewall = false; # do this manually instead

    whitelist = {
      "SECRET1" = "";
      "SECRET2" = "";
    };

    # REF: https://minecraft.wiki/w/Server.properties#Java_Edition
    serverProperties = {
      # server-ip = "" # listen on all addresses if unset
      server-port = 45000; # connection port
      "query.port" = 45000; # share game info/advertising information
      user-native-transport = true; # Linux packet RX/TX optimizations

      # Users Connections
      enforce-secure-profile = true;
      online-mode = true; # don't allow unlicensed minecraft accounts to join
      prevent-proxy-connections = false;
      rate-limit = 0;

      # Server Functionality
      enable-status = true; # where the server appears as "online"
      hide-online-players = false;
      log-ips = true;
      pause-when-empty-seconds = 60; # pause server when no player online for x seconds
      view-distance = 10; # range: 3-32
      simulation-distance = 10; # range: 3-32

      # Players
      motd = "M&M's Cozycraft Realm <3";
      max-players = 2;
      white-list = true;
      idle-player-timeout = 0; # never kick idle players

      # Gameplay
      gamemode = "survival";
      force-gamemode = true;
      difficulty = "normal";
      hardcore = false;
      pvp = true;
      allow-cheats = true;

      # World
      level-name = "M&M's Cozycraft"; # world name
      # level-seed = "" # random seed if unset
      level-type = "minecraft:normal"; # world generation preset
      generate-structures = true;
      spawn-monsters = true;
      spawn-protection = 0;
    };
    jvmOpts = "-Xms2046M -Xmx2046M -XX:+UseG1GC -XX:+CMSIncrementalPacing -XX:+CMSClassUnloadingEnabled -XX:ParallelGCThreads=2 -XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=10";
  };
}