diff --git a/flake.nix b/flake.nix
index 32debe8..429c8bc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,12 +14,6 @@
       let
         pkgs = nixpkgs.legacyPackages.${system};
 
-        # osm-data = pkgs.fetchurl {
-        #   url =
-        #     "https://static.home.all-dressed-programming.com/download.geofabrik.de/north-america/canada/quebec-241223.osm.pbf";
-        #   hash = "sha256-JkDJxODHnZQLK4+5Bjdu5GkbmHSK9TPt2ep6nsykCRg=";
-        # };
-
         poly2geojson = pkgs.rustPlatform.buildRustPackage rec {
           pname = "poly2geojson";
           version = "0.1.3";
@@ -72,12 +66,42 @@
           ];
 
           doCheck = false;
+          doInstallCheck = false;
 
           postInstall = ''
             installShellCompletion --zsh ../zsh_completion/_osmium
           '';
         };
 
+        duckdb-spatial = pkgs.clangStdenv.mkDerivation rec {
+          pname = "duckdb-spatial";
+          version = "master";
+
+          src = pkgs.fetchFromGitHub {
+            owner = "duckdb";
+            repo = "duckdb-spatial";
+            rev = "7f861c037567dadaeff9cb5dcde4e5f2e87a4e14";
+            sha256 = "sha256-8kfNofzbmPJ7+qKKzsr7LVu1mMDwGhy5nQj6/kRhYLg=";
+          };
+          librarySystemDepends = [ pkgs.zlib ];
+          executableSystemDepends = [ pkgs.zlib ];
+
+          cmakeFlags =
+            [ "-DVCPKG_TARGET_TRIPLET=${system}" "-DSPATIAL_USE_NETWORK=0" ];
+
+          nativeBuildInputs = with pkgs; [
+            cmake
+            installShellFiles
+            pandoc
+            pkg-config
+            zlib
+          ];
+
+          buildInputs = with pkgs; [ geographiclib openssl geos curl zlib ];
+
+          doCheck = false;
+        };
+
         geofabrik-base-url =
           "https://static.home.all-dressed-programming.com/download.geofabrik.de/north-america/canada/";
 
@@ -119,7 +143,7 @@
               mkdir -p cities/canada/quebec
               cp ${quebec-cities-poly}/canada/quebec/* cities/canada/quebec
               chmod u+w cities/canada/quebec
-              ${pkgs.babashka}/bin/bb  to-geojson.clj --osm-file ${osm-data} --paths cities/canada/quebec/mon*.poly
+              ${pkgs.babashka}/bin/bb  to-geojson.clj --osm-file ${osm-data} --paths cities/canada/quebec/*.poly
             '';
             installPhase = ''
               cp -r cities $out
@@ -152,10 +176,10 @@
         ]);
       in {
         packages = {
-          default = data-dir;
+          default = historical-data-dir;
           poly2geojson = poly2geojson;
           osmosis = osmosis;
-          historical-data-dir = historical-data-dir;
+          duckdb-spatial = duckdb-spatial;
         };
         devShell = pkgs.mkShell {
           name = "spacial-data-experiments";
@@ -167,6 +191,8 @@
             gdal
             custom-osmium-tool
             python-virtual-env
+            dotnet-sdk_8
+            nuget-to-nix
           ];
         };
       });
diff --git a/scripts/to-geojson.clj b/scripts/to-geojson.clj
index d0cce53..a36a8be 100644
--- a/scripts/to-geojson.clj
+++ b/scripts/to-geojson.clj
@@ -24,7 +24,7 @@
           cmd (osmium-command osm-file poly-file output-file)]
         (println "Processing " poly-file " file to " output-file)
         (println cmd)
-        (apply shell (into [{:continue false}] cmd))))
+        (apply shell (into [{:continue true}] cmd))))
 
 (def opts (cli/parse-opts *command-line-args* {:coerce {:paths []}}))