anchor.diff:  
   ###    text = builtins.readFile "/etc/nixos/files/hosts.txt";
   #    text = ''
  +#127.0.0.1 localhost.localdomain localhost
  +#    '';
   ##wtw ${nix.nixPath.nixos-config} fail
  -#    '';
   /*    source = pkgs.fetchurl {
         url = "http://winhelp2002.mvps.org/hosts.txt";
         sha256 = "1vxkv7dcp4mavcm8jqs1fkmizqf6d35kw276d0jl1rxag449caap";
       };*/
  -###    mode = "0444"; #XXX: not 0440 ffs! https://nixos.org/releases/nixos/unstable/nixos-16.09pre79453.32b7b00/manual/options.html#opt-environment.etc
  -###  };
  +#    mode = "0444"; #XXX: not 0440 ffs! https://nixos.org/releases/nixos/unstable/nixos-16.09pre79453.32b7b00/manual/options.html#opt-environment.etc
  +#  };
   };
   
   #XXX: the following is ignored when using the above 'source=' even if it's just a file and not an url; (that is, only the source= is kept!)
  
positive.code: 127.0.0.3 blockedHost blockedHost
  
  '' + builtins.readFile "/etc/nixos/files/hosts.txt";
  #TODO: replace 0.0.0.0 for blocked hosts.txt with 127.0.0.3 !
  
  # Make it easier to work with external scripts
  
negative.code:       };
  
  # Set your time zone.
        time.timeZone = "Europe/Bucharest";
  
  # List packages installed in system profile. To search by name, run:
  # $ nix-env -qaP | grep wget
  