{fetchurl}: {
  core = fetchurl {
    url = "https://dev.bukkit.org/projects/dynmap/files/4978992/download";
    sha256 = "475cd41caf659452cfcf7247285bac6b698adfc417dbf0b49b289fd1c7a02e9a";
    name = "Dynmap.jar";
  };
}