anchor.diff:    checkInputs = [ pytestCheckHook ];
     dontUseSetuptoolsCheck = true;
     # following doesn't work b/c they are distributed across different nix sitePackages dirs. Tested with pytest though.
  -  # pythonImportsCheck = [ "qiskit" "qiskit.terra" "qiskit.ignis" "qiskit.aer" "qiskit.aqua" ];
  +  pythonImportsCheck = [ "qiskit" "qiskit.circuit" "qiskit.ignis" "qiskit.providers.aer" "qiskit.aqua" ];
   
     meta = {
       description = "Software for developing quantum computing programs";
  
positive.code:     owner = "Qiskit";
      repo = "qiskit";
      rev = version;
      sha256 = "0p1sahgf6qgbkvxb067mnyj6ya8nv7y57yyiiaadhjw242sjkjy5";
    };
  
    propagatedBuildInputs = [
  
negative.code: buildPythonPackage rec {
    pname = "qiskit";
    # NOTE: This version denotes a specific set of subpackages. See https://qiskit.org/documentation/release_notes.html#version-history
    version = "0.19.6";
  
    disabled = pythonOlder "3.5";
  
  