anchor.diff:  
   in py.pkgs.buildPythonApplication rec {
     pname = "awscli";
  -  version = "1.15.66";
  +  version = "1.16.60";
   
     src = py.pkgs.fetchPypi {
       inherit pname version;
  -    sha256 = "004fbd3bb8932465205675a7de94460b5c2d45ddd6916138a2c867e4d0f2a4c4";
  +    sha256 = "25bcc6cf2304356a78429671999857ff33f88761d81bcee63463a86a6780dcdc";
     };
   
     # No tests included
  
positive.code: 
    postPatch = ''
      for i in {py,cfg}; do
        substituteInPlace setup.$i --replace "botocore==1.10.65" "botocore>=1.10.9,<=1.11"
      done
    '';
  
  
negative.code: let
    py = python.override {
      packageOverrides = self: super: {
        rsa = super.rsa.overridePythonAttrs (oldAttrs: rec {
          version = "3.4.2";
          src = oldAttrs.src.override {
            inherit version;
            sha256 = "25df4e10c263fb88b5ace923dd84bf9aa7f5019687b5e55382ffcdb8bede9db5";
          };
        });
      };
  