anchor.diff:        and provides a free alternative to the existing proprietary solution.
       '';
       homepage = "https://www.openorienteering.org/apps/mapper/";
  -    license = licenses.gpl3;
  +    changelog = "https://github.com/OpenOrienteering/mapper/releases/tag/v${version}";
  +    license = licenses.gpl3Plus;
       platforms = with platforms; linux ++ darwin;
       maintainers = with maintainers; [ mpickering sikmir ];
     };
  
positive.code: { lib, stdenv
  , mkDerivation
  , fetchFromGitHub
  , substituteAll
  , gdal
  , cmake
  
negative.code: 
  mkDerivation rec {
    pname = "OpenOrienteering-Mapper";
    version = "0.9.5";
  
    buildInputs = [
      gdal
  