anchor.diff:    # can be obtained from `pkgs' or `pkgs.xorg' (i.e. `defaultScope').
     # Use `newScope' for sets of packages in `pkgs' (see e.g. `gnome'
     # below).
  -  callPackage = self_.newScope {};
  +  callPackage = self_.newScope { };
   
     callPackages = lib.callPackagesWith defaultScope;
   
  
positive.code: 
    fetchgitPrivate = callPackage ../build-support/fetchgit/private.nix { };
  
    fetchgitrevision = import ../build-support/fetchgitrevision runCommand pkgs.git;
  
    fetchgitLocal = callPackage ../build-support/fetchgitlocal { };
  
  
negative.code:   #};
  
    #buildFHSUserEnv = args: userFHSEnv {
    #  env = buildFHSEnv (removeAttrs args [
    #    "runScript"
    #    "extraBindMounts"
    #    "extraInstallCommands"
    #    "meta"
    #  ]);
    #  runScript = args.runScript or "bash";
    #  extraBindMounts = args.extraBindMounts or [];
    #  extraInstallCommands = args.extraInstallCommands or "";
  