{ lib, buildPythonPackage, fetchPypi, isPy3k
, twisted, whisper, txamqp, cachetools, urllib3
}:

buildPythonPackage rec {
  pname = "carbon";
  version = "1.1.7";

  src = fetchPypi {
    inherit pname version;
    sha256 = "08ndphpcbdx2ab4f5jsn2y4l5p55h9wscbg7clhbyyh03r5hianr";
  };

  # Carbon-s default installation is /opt/graphite. This env variable ensures
  # carbon is installed as a regular python module.
  GRAPHITE_NO_PREFIX="True";

  propagatedBuildInputs = [ twisted whisper txamqp cachetools urllib3 ];

  meta = with lib; {
    homepage = "http://graphiteapp.org/";
    description = "Backend data caching and persistence daemon for Graphite";
    maintainers = with maintainers; [ offline basvandijk ];
    license = licenses.asl20;
  };
}