anchor.diff:    rabbitmq = pkgs.callPackage ./rabbitmq { inherit erlang; };
   
     solr = pkgs.callPackage ./solr {};
  +
  +  #
  +  # python
  +  #
  +
  +  heavy-sync = with pythonPackages; pkgs.callPackage ./heavy-sync {
  +    inherit boto;
  +    inherit gcs-oauth2-boto-plugin;
  +    inherit sqlite3;
  +  };
  +
  +  helper = pythonPackages.buildPythonPackage rec {
  +    name = "helper-2.4.1";
  +
  +    propagatedBuildInputs = with pythonPackages; [ pyyaml ];
  +    buildInputs = with pythonPackages; [ mock ];
  +
  +    src = fetchurl {
  +      url = "https://pypi.python.org/packages/source/h/helper/${name}.tar.gz";
  +      md5 = "e7146c95bbd96a12df8d737a16dca3a7";
  +    };
  +
  +    meta = with stdenv.lib; {
  +      description = "Helper";
  +      homepage = https://helper.readthedocs.org;
  +      license = licenses.bsd3;
  +    };
  +  };
  +
  +  newrelic-python = import ./newrelic-python { inherit pkgs; };
   
     statsd = pythonPackages.buildPythonPackage rec {
       name = "statsd-3.0.1";
  
positive.code:   go = pkgs.callPackage ./go/1.4.nix {};
  
    graphviz = pkgs.callPackage ./graphviz {};
  
    heavy-sync = with pythonPackages; pkgs.callPackage ./heavy-sync {
      inherit boto;
      inherit gcs-oauth2-boto-plugin;
      inherit sqlite3;
    };
  
    helper = pythonPackages.buildPythonPackage rec {
      name = "helper-2.4.1";
  
      propagatedBuildInputs = with pythonPackages; [ pyyaml ];
      buildInputs = with pythonPackages; [ mock ];
  
      src = fetchurl {
        url = "https://pypi.python.org/packages/source/h/helper/${name}.tar.gz";
        md5 = "e7146c95bbd96a12df8d737a16dca3a7";
      };
  
      meta = with stdenv.lib; {
        description = "Helper";
        homepage = https://helper.readthedocs.org;
        license = licenses.bsd3;
      };
    };
  
    imagemagick = pkgs.callPackage ./ImageMagick {
      libX11 = null;
  
negative.code:     stdenv fetchurl;
    inherit (lib) overrideDerivation;
  in rec {
    couchbase = pkgs.callPackage ./couchbase {};
  
    damemtop = pkgs.writeScriptBin "damemtop" ''
  