anchor.diff: -{ stdenv, fetchFromGitHub, callPackage
  -, bash, yarn
  +{ stdenv, fetchFromGitHub, callPackage, yarn
   , production ? true }:
   
   let
  
positive.code:     inherit (pkgInfo) name;
      dependencies = calledTemplate.nodeBuildInputs;
    };
  
  in
  
  
negative.code:       --replace node_modules "${node_modules}"
    '';
  
    # make sure vis-network find vis-data
    NODE_PATH = "${node_modules}";
  
    buildPhase = ''
      # browserify won't look in NODE_PATH for modules
      # due to the symlink yarn will also add node_modules/.bin
      # to PATH, so we don't have to do it
      ln -s ${node_modules} node_modules
      yarn ${yarnFlags} run build:assets
      yarn ${yarnFlags} run build:${target}
    '';
  
    installPhase = ''
  