self: super: {
  prosody = super.prosody.overrideAttrs (oldAttrs:  {
    communityModules = super.fetchhg {
      url = "https://hg.prosody.im/prosody-modules";
      rev = "2dcbc01c9931";
      sha256 = "0ydhbvfp7vk5zqpsc54ihxz6y2gmzh0bcgyz0xidlxrmxzwcvvyh";
    };
  });
}