anchor.diff:  { stdenv, fetchurl, pkgconfig, intltool
   , gtk3, glib, curl, goocanvas2, gpsd
  +, hamlib, wrapGAppsHook
   }:
   
   let
  
positive.code:     license = licenses.gpl2;
      platforms = platforms.linux;
      homepage = http://gpredict.oz9aec.net/;
      maintainers = [ maintainers.markuskowa ];
    };
  }
  
negative.code:     sha256 = "0hwf97kng1zy8rxyglw04x89p0bg07zq30hgghm20yxiw2xc8ng7";
    };
  
    nativeBuildInputs = [ pkgconfig intltool wrapGAppsHook ];
    buildInputs = [ curl glib gtk3 goocanvas2 gpsd hamlib ];
  
    meta = with stdenv.lib; {
      description = "Real time satellite tracking and orbit prediction";
  