anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "OpenOrienteering-Mapper";
  -  version = "0.8.4";
  +  version = "0.9.0";
   
     buildInputs = [ gdal qtbase qttools qtlocation qtimageformats
                     qtsensors clipper zlib proj doxygen cups];
  
positive.code:     "-DMapper_PACKAGE_GDAL=0"
      ]);
  
    # Needs to be available when proj_api.h gets evaluted by CPP
    NIX_CFLAGS_COMPILE = [ "-DACCEPT_USE_OF_DEPRECATED_PROJ_API_H" ];
  
    postInstall =
      stdenv.lib.optionalString stdenv.isDarwin ''
      # Fixes "This application failed to start because it could not find or load the Qt
  
negative.code:     homepage = https://www.openorienteering.org/apps/mapper/;
      license = licenses.gpl3;
      platforms = with platforms; linux ++ darwin;
      maintainers = with maintainers; [ mpickering sikmir ];
    };
  }
  