anchor.diff:      # we import package.json from the unfiltered source
       packageJSON = ./package.json;
   
  -    yarnFlags = defaultYarnFlags ++ ["--production=true"];
  +    yarnFlags = defaultYarnFlags ++ [ "--ignore-scripts" "--production=true" ];
   
       nativeBuildInputs = [ pkgs.makeWrapper ];
   
  
positive.code:     "--offline"
      "--frozen-lockfile"
      "--ignore-engines"
      "--ignore-scripts"
    ];
  
    mkYarnModules = {
  
negative.code:     yarnNix ? mkYarnNix { inherit yarnLock; },
      offlineCache ? importOfflineCache yarnNix,
      yarnFlags ? [ ],
      ignoreScripts ? true,
      pkgConfig ? {},
      preBuild ? "",
      postBuild ? "",
  