anchor.diff:      substituteInPlace requirements.txt \
         --replace "matplotlib~=3.0" "matplotlib" \
         --replace "networkx~=2.4" "networkx" \
  -      --replace "numpy~=1.16" "numpy" \
  -      --replace "requests~=2.18" "requests"
  +      --replace "numpy~=1.16" "numpy"
     '';
   
     propagatedBuildInputs = [
  
positive.code:   ];
  
    meta = with lib; {
      description = "A framework for creating, editing, and invoking Noisy Intermediate Scale Quantum (NISQ) circuits.";
      homepage = "https://github.com/quantumlib/cirq";
      changelog = "https://github.com/quantumlib/Cirq/releases/tag/v${version}";
      license = licenses.asl20;
      maintainers = with maintainers; [ drewrisinger ];
    };
  }
  
negative.code: , freezegun
  , pytest-asyncio
  }:
  
  buildPythonPackage rec {
    pname = "cirq-core";
    version = "0.12.0";
  
    disabled = pythonOlder "3.6";
  
  