anchor.diff:      homepage = "https://github.com/cocotb/cocotb";
       license = licenses.bsd3;
       maintainers = with maintainers; [ matthuszagh ];
  +    broken = stdenv.isDarwin;
     };
   }
  
positive.code: { lib, buildPythonPackage, fetchFromGitHub, setuptools, swig, verilog }:
  
  buildPythonPackage rec {
    pname = "cocotb";
  
negative.code:     do
        substituteInPlace $f --replace 'shell which' 'shell command -v'
      done
    '';
  
    checkInputs = [ swig verilog ];
  