nix: since dev and build were using teh same packages

flake.nix

@@ -8,24 +8,26 @@
   outputs = { self, nixpkgs, utils, }: utils.lib.eachDefaultSystem (system:
     let
       pkgs = nixpkgs.legacyPackages."${system}";
+
+      # find these here https://search.nixos.org/packages?channel=unstable&from=0&size=50&sort=relevance&type=packages&query=python312Packages.mkdocs
+      packages = with pkgs.python3Packages; [
+        mkdocs
+        mkdocs-material
+        mkdocs-git-revision-date-localized-plugin
+      ];
+
     in {
       defaultPackage = pkgs.stdenv.mkDerivation {
         name = "skynet-wiki";
         src = self;
-        buildInputs = [
-          pkgs.python3Packages.mkdocs
-          pkgs.python3Packages.mkdocs-material
-        ];
+        buildInputs = packages;
         buildPhase = "mkdocs build";
         installPhase = "mkdir -p $out; cp -R site/* $out;";
       };
 
       devShells.default = pkgs.mkShell {
         name = "Skynet Wiki env";
-        packages = [
-          pkgs.python3Packages.mkdocs
-          pkgs.python3Packages.mkdocs-material
-        ];
+        packages = packages;
       };
     }
   );