anchor.diff:  rec {
   
     
  -  nixpkgsRel = "nixpkgs-0.11pre7861";
  +  nixpkgsRel = "nixpkgs-0.11pre7871";
   
   
     configuration = {
  
positive.code:       readOnlyRoot = true;
        # The label used to identify the installation CD.
        rootLabel = "NIXOS";
        initrd = {
          enableSplashScreen = pkgs.stdenv.system != "x86_64-linux";
        };
      };
      
      services = {
  
negative.code:   # Get a recent copy of Nixpkgs.
    nixpkgsTarball = pkgs.fetchurl {
      url = configuration.installer.nixpkgsURL + "/" + nixpkgsRel + ".tar.bz2";
      md5 = "262eadc0c4d1d954cf0ac8b03a9edfef";
    };
  
  
  