anchor.diff:  
   buildPythonPackage rec {
     pname = "qiskit-terra";
  -  version = "0.17.0";
  +  version = "0.17.4";
   
     disabled = pythonOlder "3.6";
   
  
positive.code: { lib
  , pythonOlder
  , buildPythonPackage
  , fetchFromGitHub
  
negative.code:     owner = "Qiskit";
      repo = pname;
      rev = version;
      hash = "sha256-JyNuke+XPqjLVZbvPud9Y7k0+EmvETVKcOYcDldBiVo=";
    };
  
    nativeBuildInputs = [ cython ];
  