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

index 81d4c88e644a5b9ff9d3d0657835eb5644943c2c..a8cb1a6b9ffc86a55e531f4bf13a5d1bfc38e561 100644

--- a/nix/sources.json

+++ b/nix/sources.json

@@ -385,6 +385,16 @@ "type": "tarball",

     "url": "https://github.com/morse-talk/morse-talk/archive/71e09ace0aa554d28cada5ee658e43758305b8fa.tar.gz",

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

 },

• "mtk-suomi": {

•    "builtin": false,
  

•    "description": "Maanmittauslaitoksen peruskartan tasoiset ja näköiset ilmaiset maastokartat",
  

•    "homepage": "https://kartat.hylly.org/",
  

•    "sha256": "1nf10nljnnahi7adj2pn1l6kl3ak69prc1jjqmrrnajm53g8c1il",
  

•    "type": "file",
  

•    "url": "https://kartat-dl.hylly.org/2020-04-18/mtk_suomi.img",
  

•    "url_template": "https://kartat-dl.hylly.org/<version>/mtk_suomi.img",
  

•    "version": "2020-04-18"
  

• },

 "openmtbmap_openvelomap_linux": {

     "branch": "master",

     "builtin": false,

diff --git a/pkgs/data/maps/mtk-suomi/default.nix b/pkgs/data/maps/mtk-suomi/default.nix

new file mode 100644

index 0000000000000000000000000000000000000000..a0cc6d1101c3c490f33c23e626bee3243e0855be

--- /dev/null

+++ b/pkgs/data/maps/mtk-suomi/default.nix

@@ -0,0 +1,23 @@

+{ stdenv, sources }:

+stdenv.mkDerivation rec {

• pname = "mtk-suomi";

• version = sources.mtk-suomi.version;

• src = sources.mtk-suomi;

• preferLocalBuild = true;

• dontUnpack = true;

• installPhase = ''

• install -Dm644 $src $out/share/gpxsee/maps/mtk_suomi.img

• '';

• meta = with stdenv.lib; {

• inherit (src) description homepage;

• license = licenses.free;

• maintainers = with maintainers; [ sikmir ];

• platforms = platforms.all;

• skip.ci = true;

• };

+}

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

index 6585b313ba1652e7a0bbb357ac52be941f77bae9..6d85b3f03c340d8a4d33e37fce64141ee52fecc6 100644

--- a/pkgs/default.nix

+++ b/pkgs/default.nix

@@ -36,6 +36,7 @@

 gpxsee-maps = callPackage ./data/maps/gpxsee-maps {};

 hiblovgpsmap = callPackage ./data/maps/hiblovgpsmap {};

 maptourist = callPackage ./data/maps/maptourist {};

• mtk-suomi = callPackage ./data/maps/mtk-suomi {};

 opentopomap = callPackage ./data/maps/opentopomap {};

 qmapshack-onlinemaps = callPackage ./data/maps/qmapshack-onlinemaps {};

 qmapshack-routinodb = callPackage ./data/maps/qmapshack-routinodb {};