anchor.diff:      owner = "Qiskit";
       repo = "qiskit-aqua";
       rev = version;
  -    sha256 = "11qyya3vyq50wpzrzzl8v46yx5p72rhpqhybwn47qgazxgg82r1b";
  +    sha256 = "sha256-ybf8bXqsVk6quYi0vrfo/Mplk7Nr7tQS7cevXxI9khw=";
     };
   
     # Optional packages: pyscf (see below NOTE) & pytorch. Can install via pip/nix if needed.
  
positive.code:   # It can also be installed at runtime from the pip wheel.
    # We disable appropriate tests below to allow building without pyscf installed
  
    # NOTE: we remove cplex b/c we can't build pythonPackages.cplex.
    # cplex is only distributed in manylinux1 wheel (no source), and Nix python is not manylinux1 compatible
  
    postPatch = ''
      substituteInPlace setup.py \
        --replace "pyscf; sys_platform != 'win32'" "" \
        --replace "cplex; python_version >= '3.6' and python_version < '3.8'" ""
  
      # Add ImportWarning when running qiskit.chemistry (pyscf is a chemistry package) that pyscf is not included
      echo -e "\nimport warnings\ntry: import pyscf;\nexcept ImportError:\n    " \
  
negative.code: 
  buildPythonPackage rec {
    pname = "qiskit-aqua";
    version = "0.8.2";
  
    disabled = pythonOlder "3.6";
  
  