anchor.diff:        cocotb/share/makefiles/simulators/Makefile.*
       do
         substituteInPlace $f --replace 'shell which' 'shell command -v'
  -      # replace hardcoded gcc. Remove once https://github.com/cocotb/cocotb/pull/1137 gets merged
  -      substituteInPlace $f --replace 'gcc' '$(CC)'
  -      substituteInPlace $f --replace 'g++' '$(CXX)'
       done
  +
  +    # This can probably be removed in the next update after 1.3.0
  +    substituteInPlace cocotb/share/makefiles/Makefile.inc --replace "-Werror" ""
     '';
   
     checkInputs = [ swig verilog ];
  
positive.code: 
  buildPythonPackage rec {
    pname = "cocotb";
    version = "1.2.0";
  
    src = fetchFromGitHub {
      owner = pname;
      repo = pname;
      rev = "v${version}";
      sha256 = "091q63jcm87xggqgqi44lw2vjxhl1v4yl0mv2c76hgavb29w4w5y";
    };
  
    propagatedBuildInputs = [
  
negative.code: 
    meta = with stdenv.lib; {
      description = "Coroutine based cosimulation library for writing VHDL and Verilog testbenches in Python";
      homepage = "https://github.com/cocotb/cocotb";
      license = licenses.bsd3;
      maintainers = with maintainers; [ matthuszagh ];
    };
  