anchor.diff:        platforms = stdenv.lib.platforms.all;
       };
     };
  -  
  +
   }
  
positive.code:       platforms = stdenv.lib.platforms.linux;
      };
    };
    
    agent = stdenv.mkDerivation {
      name = "zabbix-agent-${version}";
  
  
negative.code: 
  let
  
    version = "1.8.15";
  
    src = fetchurl {
      url = "mirror://sourceforge/zabbix/zabbix-${version}.tar.gz";
      sha256 = "0358syx6vck6l8j9wwlsb78faivh4qxrgy3jlkmjqr99xi6h3r3f";
    };
  
    preConfigure =
  