anchor.diff:      yarnNix ? mkYarnNix { inherit yarnLock; },
       offlineCache ? importOfflineCache yarnNix,
       yarnFlags ? [ ],
  +    ignoreScripts ? true,
       pkgConfig ? {},
       preBuild ? "",
       postBuild ? "",
  
positive.code:     "--offline"
      "--frozen-lockfile"
      "--ignore-engines"
      "--ignore-scripts"
    ];
  
    mkYarnModules = {
  
negative.code: 
          ${workspaceDependencyLinks}
  
          yarn install ${lib.escapeShellArgs (defaultYarnFlags ++ lib.optional ignoreScripts "--ignore-scripts" ++ yarnFlags)}
  
          ${lib.concatStringsSep "\n" postInstall}
  
  