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:     owner = "OpenOrienteering";
      repo = "mapper";
      rev = "v${version}";
      sha256 = "0rw34kp2vd1la97vnk9plwvis6lvyib2bvs7lgkhpnm4p5l7dp1g";
    };
  
    cmakeFlags =
  
negative.code:     "-DMapper_PACKAGE_GDAL=0"
      ]);
  
    postInstall =
      stdenv.lib.optionalString stdenv.isDarwin ''
      # Fixes "This application failed to start because it could not find or load the Qt
  