not working nvim config

nixos/modules/users/nvim.nix

@@ -0,0 +1,19 @@
+{
+  pkgs,
+  ...
+}: 
+let
+  nvf = import (builtins.fetchTarball {
+    url = "https://github.com/notashelf/nvf/archive/v0.7.tar.gz";
+    # Optionally, you can add 'sha256' for verification and caching
+    # sha256 = "<sha256>";
+  });
+in{
+  imports = [
+    nvf.nixosModules.nvf
+  ];
+
+  programs.nvf = {
+    enable = true;
+  };
+}