anchor.diff:  
     cmakeFlags = [ "-DCURA_ENGINE_VERSION=${version}" ];
   
  -  meta = with stdenv.lib; {
  +  meta = with gcc8Stdenv.lib; {
       description = "A powerful, fast and robust engine for processing 3D models into 3D printing instruction";
       homepage = https://code.alephobjects.com/source/curaengine-lulzbot/;
       license = licenses.agpl3;
  
positive.code: { stdenv, callPackage, fetchgit, fetchpatch, cmake, libarcusLulzbot, stb, protobuf }:
  
  stdenv.mkDerivation rec {
    pname = "curaengine-lulzBot";
    version = "3.6.21";
  
  
negative.code:     maintainers = with maintainers; [ chaduffy ];
    };
  }
  