anchor.diff:        one takes the GPS data in a different format.
       '';
   
  -    license = stdenv.lib.licenses.gpl2Plus;
  -
  -    homepage = http://freefoote.dview.net/linux_gpscorr.html;
  -    platforms = stdenv.lib.platforms.linux;
  +    license = licenses.gpl2Plus;
  +    homepage = https://github.com/freefoote/gpscorrelate;
  +    platforms = platforms.linux;
     };
   }
  
positive.code:         -es",^[[:blank:]]*prefix[[:blank:]]*=.*$,prefix = $out,g"
    '';
  
    meta = {
      description = "A GPS photo correlation tool, to add EXIF geotags";
  
      longDescription = ''
  
negative.code: { fetchFromGitHub, stdenv, pkgconfig, exiv2, libxml2, gtk2
  , libxslt, docbook_xsl, docbook_xml_dtd_42 }:
  
  stdenv.mkDerivation rec {
    name = "gpscorrelate-${version}";
    version = "1.6.1";
  
    src = fetchFromGitHub {
      owner = "freefoote";
      repo = "gpscorrelate";
      rev = version;
      sha256 = "1z0fc75rx7dl6nnydksa578qv116j2c2xs1czfiijzxjghx8njdj";
    };
  
    nativeBuildInputs = [ pkgconfig ];
    buildInputs = [
      exiv2 libxml2 gtk2
      libxslt docbook_xsl 
      docbook_xml_dtd_42
    ];
  
    patchPhase = ''
  