anchor.diff: -{ stdenv, callPackage, fetchgit, fetchpatch, cmake, libarcusLulzbot, stb, protobuf }:
  +{ gcc8Stdenv, callPackage, fetchgit, fetchpatch, cmake, libarcusLulzbot, stb, protobuf }:
   
  -stdenv.mkDerivation rec {
  +gcc8Stdenv.mkDerivation rec {
     pname = "curaengine-lulzBot";
     version = "3.6.21";
   
  
positive.code: 
    cmakeFlags = [ "-DCURA_ENGINE_VERSION=${version}" ];
  
    meta = with stdenv.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;
  
negative.code:     maintainers = with maintainers; [ chaduffy ];
    };
  }
  