anchor.diff:  
   buildPythonPackage rec {
     pname = "qiskit-terra";
  -  version = "0.15.1";
  +  version = "0.16.1";
   
  -  disabled = pythonOlder "3.5";
  +  disabled = pythonOlder "3.6";
   
     src = fetchFromGitHub {
       owner = "Qiskit";
       repo = pname;
       rev = version;
  -    sha256 = "1p7y36gj3675dmp05nwi0m9nc7h0bwyimir3ncf9wbkx3crrh99c";
  +    sha256 = "0007glsbrvq9swamvz8r76z9nzh46b388y0ds1dypczxpwlp9xcq";
     };
   
     nativeBuildInputs = [ cython ];
  
positive.code: 
    pytestFlagsArray = [
      "--ignore=test/randomized/test_transpiler_equivalence.py" # collection requires qiskit-aer, which would cause circular dependency
    ];
  
    # Moves tests to $PACKAGEDIR/test. They can't be run from /build because of finding
  
negative.code:     nbconvert
      pytestCheckHook
    ];
  
    pythonImportsCheck = [
      "qiskit"
  