anchor.diff:    # Get a recent copy of Nixpkgs.
     nixpkgsTarball = pkgs.fetchurl {
       url = configuration.installer.nixpkgsURL + "/" + nixpkgsRel + ".tar.bz2";
  -    md5 = "f88f686e7bbe33065b3c9f3ce5224fea";
  +    md5 = "262eadc0c4d1d954cf0ac8b03a9edfef";
     };
   
   
  
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: rec {
  
    
    nixpkgsRel = "nixpkgs-0.11pre7871";
  
  
    configuration = {
  