anchor.diff:      else "nixos-${builtins.readFile ../../VERSION}"
   , compressImage ? false
   , nixpkgs ? ../../../nixpkgs
  +, services ? ../../../services
   # This option allows easy building of Rescue CD with 
   # modified package set / driver set / anything.
   # For easier maitenance, let overrider know the current
  
positive.code:   nixosTarball = makeTarball "nixos.tar.bz2" ../..;
  
  
    # Put Nixpkgs in a tarball.
    nixpkgsTarball = makeTarball "nixpkgs.tar.bz2" nixpkgs;
  
  
negative.code: , configurationOverrides ? (config: {})
  # Whether to put all the build-time dependencies on DVD
  , includeBuildDeps ? false
  , includeTarballs ? true
  }:
  
  rec {
  