anchor.diff:            ++ go-env
             ++ node-env
             ++ ocaml-env
  -          ++ python2-env;
  +          ++ python2-env
  +          ++ scala-env;
         };
       };
     }
  
positive.code:     linux = [ pylint ];
    };
  
  in
    rec {
      allowUnfree = true;
  
negative.code:       tcpdump
        wget
        bind
        traceroute
      ];
    };
  
  