anchor.diff:    };
   
     botocore = buildPythonPackage rec {
  -    version = "1.4.41"; # This version is required by awscli
  +    version = "1.4.67"; # This version is required by awscli
       name = "botocore-${version}";
   
       src = pkgs.fetchurl {
         url = "mirror://pypi/b/botocore/${name}.tar.gz";
  -      sha256 = "0c3abr2rxiilqklika8x360pr0mgx7hlhbhj8w72izs2r6ww4dys";
  +      sha256 = "15fh3ng33mcbhm76pk9qqglf342qj471gfcqxv0nrl9f8sn3v60q";
       };
   
       propagatedBuildInputs =
  
positive.code: 
    awscli = buildPythonPackage rec {
      name = "awscli-${version}";
      version = "1.10.51";
  
      namePrefix = "";
  
      src = pkgs.fetchurl {
        url = "mirror://pypi/a/awscli/${name}.tar.gz";
        sha256 = "19n7r6fwnwpi0cyrqh20w80mrcj0b6j3if5p58hi1k3fdp60nscq";
      };
  
      # No tests included
  
negative.code: 
    dateutil = buildPythonPackage (rec {
      name = "dateutil-${version}";
      version = "2.5.3";
  
      src = pkgs.fetchurl {
        url = "mirror://pypi/p/python-dateutil/python-${name}.tar.gz";
        sha256 = "1v9j9fmf8g911yg6k01xa2db6dx3wv73zkk7fncsj7vagjqgs20l";
      };
  
      propagatedBuildInputs = with self; [ self.six ];
  