anchor.diff:        '';
   
       in {
  -      "memcached-${name}" = {
  +      name = "memcached-${name}";
  +      value = {
           description = "memcached (${name})";
           wantedBy = [ "multi-user.target" ];
           after = [ "keys.target" "network.target" "local-fs.target" ];
  
positive.code:   };
  
    config = {
      systemd.services = foldl (a: b: a//b) {} (mapAttrsToList mkService instances);
      nixsap.system.users.daemons = users;
    };
  
  
negative.code:     elem filter isBool isList ;
  
    inherit (lib)
      concatMapStringsSep concatStringsSep filterAttrs flatten
      foldAttrs mapAttrs' mapAttrsToList mkOption optionalString ;
  
    inherit (lib.types)
      attrsOf submodule ;
  