anchor.diff:      sensors = {
         buildInputs = lib.optionals stdenv.isLinux [ lm_sensors ];
       };
  -    serial = {};
       sigrok = {
         buildInputs = lib.optionals stdenv.isLinux [ libsigrok udev ];
       };
  
positive.code:     perl = {
        buildInputs = [ perl ];
      };
      pf = {};
      pinba = {
        buildInputs = [ protobufc ];
      };
  
negative.code:     dns = {
        buildInputs = [ libpcap ];
      };
      ipmi = {
        buildInputs = [ openipmi ];
      };
  