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

index 96d1db9efa33de148bc26530f5008c61b752c4d1..5577deb17838e4c139ddf4e65385e569118c07bf 100644

--- a/nix/sources.json

+++ b/nix/sources.json

@@ -569,6 +569,20 @@ "type": "tarball",

     "url": "https://github.com/OpenOrienteering/mapper/archive/d17d1e46232f1e481be86bc5d9b6ecebcd4fd81b.tar.gz",

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

 },

• "maprec": {

•    "branch": "master",
  

•    "builtin": false,
  

•    "date": "2019-10-24T18:36:24Z",
  

•    "description": null,
  

•    "homepage": "https://github.com/wladich/maprec",
  

•    "owner": "wladich",
  

•    "repo": "maprec",
  

•    "rev": "20f5177cae7454455b21cd5f7178f5639c02d385",
  

•    "sha256": "1zy49sbpxjg5dvkvxxxy2fh1vq26q0cnjdszb5zpwnxqmk7c4lpj",
  

•    "type": "tarball",
  

•    "url": "https://github.com/wladich/maprec/archive/20f5177cae7454455b21cd5f7178f5639c02d385.tar.gz",
  

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

• },

 "mapsoft": {

     "branch": "master",

     "builtin": false,

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

index db8a8e543403a486082eaf9000130616e9aefc68..9a08c5fa4e00d692c89e0d29baff275a835863fb 100644

--- a/pkgs/default.nix

+++ b/pkgs/default.nix

@@ -120,6 +120,7 @@ cheetah3 = callPackage ./development/python-modules/cheetah3 { };

 click-6-7 = callPackage ./development/python-modules/click { };

 gpxelevations = callPackage ./development/python-modules/gpxelevations { };

 jsonseq = callPackage ./development/python-modules/jsonseq { };

• maprec = callPackage ./development/python-modules/maprec { };

 mercantile = callPackage ./development/python-modules/mercantile { };

 mikatools = callPackage ./development/python-modules/mikatools { };

 pyephem = callPackage ./development/python-modules/pyephem { };

diff --git a/pkgs/development/python-modules/maprec/default.nix b/pkgs/development/python-modules/maprec/default.nix

new file mode 100644

index 0000000000000000000000000000000000000000..13a67c5f0c39e13ced027c0f4927d6fc6c68a2d2

--- /dev/null

+++ b/pkgs/development/python-modules/maprec/default.nix

@@ -0,0 +1,25 @@

+{ lib, python3Packages, thinplatespline, sources }:

+python3Packages.buildPythonPackage {

• pname = "maprec";

• version = lib.substring 0 10 sources.maprec.date;

• src = sources.maprec;

• patches = [ ./python3.patch ];

• postPatch = "2to3 -n -w maprec/*.py";

• propagatedBuildInputs = with python3Packages; [ pyyaml pyproj thinplatespline ];

• doCheck = false;

• pythonImportsCheck = [ "maprec" ];

• meta = with lib; {

• inherit (sources.maprec) description homepage;

• license = licenses.free;

• maintainers = [ maintainers.sikmir ];

• platforms = platforms.unix;

• };

+}

diff --git a/pkgs/development/python-modules/maprec/python3.patch b/pkgs/development/python-modules/maprec/python3.patch

new file mode 100644

index 0000000000000000000000000000000000000000..a9e37e0fc742ae8c889ed31dba9eaea7312eb385

--- /dev/null

+++ b/pkgs/development/python-modules/maprec/python3.patch

@@ -0,0 +1,13 @@

+diff --git i/maprec/map_record.py w/maprec/map_record.py

+index 2a58b0f..d1ce585 100644

+--- i/maprec/map_record.py

++++ w/maprec/map_record.py

+@@ -161,7 +161,7 @@ class Maprecord(object):

•         data['image_size'] = os.path.getsize(self.image_path)
  

•         data['image_mtime'] = os.path.getmtime(self.image_path)
  

•         data = json.dumps(data)
  

+- self._fingerprint = hashlib.sha1(data).hexdigest()

++ self._fingerprint = hashlib.sha1(str(data).encode('utf-8')).hexdigest()

•     return self._fingerprint
  

• #def write(filename, image_path, srs, gcps, cutline=None, image_path_relative=True):