Persist .nix-package-search to avoid constant re-indexing
diff --git a/modules/nix-package-search.nix b/modules/nix-package-search.nix
new file mode 100644
index 0000000..6ee0f9b
--- /dev/null
+++ b/modules/nix-package-search.nix
@@ -0,0 +1,5 @@
+{ nps, system, username, ... }: {
+  config.environment.persistence."/nix/persist".users.${username}.directories =
+    [ ".nix-package-search" ];
+  home.home.packages = [ nps.defaultPackage.${system} ];
+}