anchor.diff:      '';
     # Unpack Moodle and put the config file in its root directory.
     moodleRoot = pkgs.stdenv.mkDerivation rec {
  -    name= "moodle-2.8.5";
  +    name= "moodle-2.8.10";
   
       src = pkgs.fetchurl {
         url = "https://download.moodle.org/stable28/${name}.tgz";
  -      sha256 = "1a159a193010cddedce10ee009184502e6f732e4d7c85167d8597fe5dff9e190";
  +      sha256 = "0c3r5081ipcwc9s6shakllnrkd589y2ln5z5m1q09l4h6a7cy4z2";
       };
   
       buildPhase =
         ''
  -      ''; 
  +      '';
   
       installPhase =
         ''
  
positive.code:       type = types.path;
        };
  
      
      extraConfig = mkOption {
        default = "";
        example =
  
negative.code:         cleartext in the Nix store!
        '';
      };
  
      dbPrefix = mkOption {
        default = "mdl_";
        example = "my_other_mdl_";
  