diff --git a/nix/sources.json b/nix/sources.json

index e84882b0a7a3012cdd66ee4c00dd72d445dad52d..7df44241dd0e3f470e66a084dbfaf1e5ffcbb1cf 100644

--- a/nix/sources.json

+++ b/nix/sources.json

@@ -247,6 +247,20 @@ "type": "tarball",

     "url": "https://github.com/BourgeoisLab/GPXLab/archive/c9e2daf790ce7eb88c3bdcf17b98541d60c40894.tar.gz",

     "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"

 },

• "gpxlib": {

•    "branch": "master",
  

•    "builtin": false,
  

•    "date": "2019-11-27T18:32:49Z",
  

•    "description": "A c++ library for parsing, browsing, changing and writing of GPX files",
  

•    "homepage": "http://irdvo.nl/gpxlib/",
  

•    "owner": "irdvo",
  

•    "repo": "gpxlib",
  

•    "rev": "9c247c4892156af13a8c32c14121115c8ff934b2",
  

•    "sha256": "1g5j0bv4l3jh9wxjizx4im5hyl32jm7xrw03ysaxd29dpvwr07y2",
  

•    "type": "tarball",
  

•    "url": "https://github.com/irdvo/gpxlib/archive/9c247c4892156af13a8c32c14121115c8ff934b2.tar.gz",
  

•    "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
  

• },

 "gpxsee": {

     "branch": "master",

     "builtin": false,

diff --git a/pkgs/default.nix b/pkgs/default.nix

index 2c14f9b1a4d0d629e97decdde9e086b0744fc03a..94bc4cfd64aef3334969f77212a0127bfa55e6d9 100644

--- a/pkgs/default.nix

+++ b/pkgs/default.nix

@@ -70,6 +70,7 @@ foma = callPackage ./development/libraries/foma {

   libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;

 };

 geographiclib = callPackage ./development/libraries/geographiclib { };

• gpxlib = callPackage ./development/libraries/gpxlib { };

 hfst = callPackage ./development/libraries/hfst { };

 libgarmin = callPackage ./development/libraries/libgarmin {

   automake = pkgs.automake111x;

diff --git a/pkgs/development/libraries/gpxlib/default.nix b/pkgs/development/libraries/gpxlib/default.nix

new file mode 100644

index 0000000000000000000000000000000000000000..1be20d3734082c3f8fcc517957905b67db61c412

--- /dev/null

+++ b/pkgs/development/libraries/gpxlib/default.nix

@@ -0,0 +1,21 @@

+{ stdenv, cmake, expat, sources }:

+let

• pname = "gpxlib";

• date = stdenv.lib.substring 0 10 sources.gpxlib.date;

• version = "unstable-" + date;

+in

+stdenv.mkDerivation {

• inherit pname version;

• src = sources.gpxlib;

• nativeBuildInputs = [ cmake ];

• buildInputs = [ expat ];

• meta = with stdenv.lib; {

• inherit (sources.gpxlib) description homepage;

• license = licenses.lgpl3;

• maintainers = with maintainers; [ sikmir ];

• platforms = platforms.unix;

• };

+}