nvs: refactor (#435098)

pkgs/by-name/nv/nvs/package.nix

@@ -4,6 +4,7 @@
   installShellFiles,
   writableTmpDirAsHomeHook,
   lib,
+  nix-update-script,
 }:
 buildGoModule (finalAttrs: {
   pname = "nvs";
@@ -37,6 +38,10 @@ buildGoModule (finalAttrs: {
 
   __darwinAllowLocalNetworking = true;
 
+  passthru = {
+    updateScript = nix-update-script { };
+  };
+
   meta = {
     mainProgram = "nvs";
     description = "Lightweight Neovim Version & Config Manager CLI tool to install, switch, list, uninstall, and reset Neovim versions";