{ stdenv, fetchFromGitHub, znc }:

let
  zncDerivation = a@{
    name, src, module_name,
    buildPhase ? "${znc}/bin/znc-buildmod ${module_name}.cpp",
    installPhase ? "install -D ${module_name}.so $out/lib/znc/${module_name}.so", ...
  } : stdenv.mkDerivation (a // {
    inherit buildPhase;
    inherit installPhase;

    buildInputs = znc.buildInputs;

    meta = a.meta // { platforms = stdenv.lib.platforms.unix; };
    passthru.module_name = module_name;
  });

in rec {

  backlog = zncDerivation rec {
    name = "znc-backlog-${version}";
    version = "git-2017-06-13";
    module_name = "backlog";

    src = fetchFromGitHub {
      owner = "FruitieX";
      repo = "znc-backlog";
      rev = "42e8f439808882d2dae60f2a161eabead14e4b0d";
      sha256 = "1k7ifpqqzzf2j7w795q4mx1nvmics2higzjqr3mid3lp43sqg5s6";
    };

    meta = with stdenv.lib; {
      description = "Request backlog for IRC channels.";
      homepage = https://github.com/fruitiex/znc-backlog/;
      license = licenses.asl20;
      maintainers = with maintainers; [ infinisil ];
    };
  };

  clientbuffer = zncDerivation rec {
    name = "znc-clientbuffer-${version}";
    version = "git-2015-08-27";
    module_name = "clientbuffer";

    src = fetchFromGitHub {
      owner = "jpnurmi";
      repo = "znc-clientbuffer";
      rev = "fe0f368e1fcab2b89d5c94209822d9b616cea840";
      sha256 = "1s8bqqlwy9kmcpmavil558rd2b0wigjlzp2lpqpcqrd1cg25g4a7";
    };

    meta = with stdenv.lib; {
      description = "ZNC module for client specific buffers";
      homepage = https://github.com/jpnurmi/znc-clientbuffer;
      license = licenses.asl20;
      maintainers = with maintainers; [ hrdinka ];
    };
  };

  fish = zncDerivation rec {
    name = "znc-fish-${version}";
    version = "git-2014-10-10";
    module_name = "fish";

    src = fetchFromGitHub {
      # this fork works with ZNC 1.6
      owner = "jarrydpage";
      repo = "znc-fish";
      rev = "9c580e018a1a08374e814fc06f551281cff827de";
      sha256 = "0yvs0jkwwp18qxqvw1dvir91ggczz56ka00k0zlsb81csdi8xfvl";
    };

    meta = {
      description = "ZNC FiSH module";
      homepage = https://github.com/dctrwatson/znc-fish;
      maintainers = [ stdenv.lib.maintainers.offline ];
    };
  };

  playback = zncDerivation rec {
    name = "znc-playback-${version}";
    version = "git-2015-08-04";
    module_name = "playback";

    src = fetchFromGitHub {
      owner = "jpnurmi";
      repo = "znc-playback";
      rev = "8691abf75becc1f3d7b5bb5ad68dad17cd21863b";
      sha256 = "0mgfajljy035051b2sx70i8xrb51zw9q2z64kf85zw1lynihzyh4";
    };

    meta = with stdenv.lib; {
      description = "An advanced playback module for ZNC";
      homepage = https://github.com/jpnurmi/znc-playback;
      license = licenses.asl20;
      maintainers = with maintainers; [ hrdinka ];
    };
  };

  privmsg = zncDerivation rec {
    name = "znc-privmsg-${version}";
    version = "git-2015-02-22";
    module_name = "privmsg";

    src = fetchFromGitHub {
      owner = "kylef";
      repo = "znc-contrib";
      rev = "9f1f98db56cbbea96d83e6628f657e0d62cd9517";
      sha256 = "0n82z87gdxxragcaixjc80z8bw4bmfwbk0jrf9zs8kk42phlkkc2";
    };

    meta = {
      description = "ZNC privmsg module";
      homepage = https://github.com/kylef/znc-contrib;
    };
  };

  push = zncDerivation rec {
    name = "znc-push-${version}";
    version = "git-2016-10-12";
    module_name = "push";

    src = fetchFromGitHub {
      owner = "jreese";
      repo = "znc-push";
      rev = "cf08b9e0f483f03c28d72dd78df932cbef141f10";
      sha256 = "0xpwjw8csyrg736g1jc1n8d6804x6kbdkrvldzhk9ldj4iwqz7ay";
    };

    meta = {
      description = "Push notification service module for ZNC";
      homepage = https://github.com/jreese/znc-push;
      license = stdenv.lib.licenses.mit;
      maintainers = with stdenv.lib.maintainers; [ offline schneefux ];
    };
  };

}