anchor.diff:  
   buildPythonPackage rec {
     pname = "qiskit-terra";
  -  version = "0.20.0";
  +  version = "0.20.1";
   
     disabled = pythonOlder "3.7";
   
  
positive.code:   cargoDeps = rustPlatform.fetchCargoTarball {
      inherit src;
      name = "${pname}-${version}";
      sha256 = "sha256-tNiBXn32g1PTuTmKNXSac+4PLSc1Ao9n+oAMfvVYR30=";
    };
  
    propagatedBuildInputs = [
  
negative.code:     owner = "qiskit";
      repo = pname;
      rev = version;
      sha256 = "sha256-spKLPUlUXBmnIo/rnBPUFf72Vxd53xFhh409KzytpkI=";
    };
  
    nativeBuildInputs = [ setuptools-rust ] ++ (with rustPlatform; [ rust.rustc rust.cargo cargoSetupHook ]);
  