anchor.diff:      owner = "Qiskit";
       repo = pname;
       rev = version;
  -    sha256 = "0b5mnq8f5844idnsmp84lpkvlpszfwwi998yvggcgaayw1dbk53h";
  +    sha256 = "1i5dj5dl0hxqd61bdflyy6yq958fj9qhf6s6m40n1vnql7g50gdx";
     };
   
     propagatedBuildInputs = [
  
positive.code: , nbconvert
  , nbformat
  , pproxy
  , vcrpy
  }:
  
  
negative.code:     nbconvert
      nbformat
      pproxy
      qiskit-aer
      vcrpy
    ] ++ lib.optionals (!withVisualization) visualizationPackages;
  
  