{ stdenv, fetchgit, buildNimblePackage, gnunet, makeWrapper }:

let
  gnunet_nim = buildNimblePackage rec {
    name = "gnunet_nim-${version}";
    version = "0.1.0";
    src = fetchgit {
      url =  https://git.gnunet.org/gnunet-nim.git;
      rev = "1fce7e265d2c896cc5c385c4cd818e399121f822";
      sha256 = "19qkw0ga109570w1l7pwgv68dvy8mz2c8q78ijkc3xsx6y3rizb2";
    };
    
    buildInputs = [ gnunet ];
  };
in
buildNimblePackage rec {
  name = "groupchat-${version}";
  version = "0.1.0";

  src = fetchgit {
    url =  https://git.gnunet.org/groupchat.git;
    rev = "4f646aab73ad5e5dea7b925cae9e0505aeaa8f72";
    sha256 = "1yw69jyzfn0ilnlwpz5pm0z8f5z46423401c4krg66l6b1n4k0xz";
  };

  nimDeps = [ gnunet_nim ];

  buildInputs = [ makeWrapper ];

  postInstall = ''
    wrapProgram $out/bin/groupchat --prefix LD_LIBRARY_PATH : ${gnunet}/lib --prefix PATH : ${gnunet}/bin
  '';
}