anchor.diff:  
   buildPythonPackage rec {
     pname = "qiskit-aqua";
  -  version = "0.9.1";
  +  version = "0.9.5";
   
     disabled = pythonOlder "3.6";
   
  
positive.code: , withTorch ? false
  , pytorch
  , withPyscf ? false
  , pyscf ? null
  , withScikitQuant ? false
  , scikit-quant ? null
  , withCplex ? false
  
negative.code:     owner = "Qiskit";
      repo = "qiskit-aqua";
      rev = version;
      sha256 = "sha256-7QmRwlbAVAR5KfM7tuObkb6+UgiuIm82iGWBuqfve08=";
    };
  
    # Optional packages: pyscf (see below NOTE) & pytorch. Can install via pip/nix if needed.
  