nixpkgs/pkgs/development/python-modules/celery/default.nix

{ stdenv, buildPythonPackage, fetchPypi, isPy37, fetchpatch, iana-etc, libredirect
, case, pytest, boto3, moto, kombu, billiard, pytz, anyjson, amqp, eventlet
}:

buildPythonPackage rec {
  pname = "celery";
  version = "4.3.0rc1";

  src = fetchPypi {
    inherit pname version;
    sha256 = "1jmg47l0b3bnwmg44x48bwziwyk6xqs1y5plvr99a3ikz1l807yf";
  };

  # make /etc/protocols accessible to fix socket.getprotobyname('tcp') in sandbox
  preCheck = stdenv.lib.optionalString stdenv.isLinux ''
    export NIX_REDIRECTS=/etc/protocols=${iana-etc}/etc/protocols \
      LD_PRELOAD=${libredirect}/lib/libredirect.so
  '';
  postCheck = stdenv.lib.optionalString stdenv.isLinux ''
    unset NIX_REDIRECTS LD_PRELOAD
  '';

  checkInputs = [ case pytest boto3 moto ];
  propagatedBuildInputs = [ kombu billiard pytz anyjson amqp eventlet ];

  meta = with stdenv.lib; {
    homepage = https://github.com/celery/celery/;
    description = "Distributed task queue";
    license = licenses.bsd3;
  };
}