diff --git a/yodaTux/configuration.nix b/yodaTux/configuration.nix
index d3de269..394e951 100644
--- a/yodaTux/configuration.nix
+++ b/yodaTux/configuration.nix
@@ -121,8 +121,10 @@
   # List packages installed in system profile. To search, run:
   # $ nix search wget
   environment.systemPackages = with pkgs; [
-  #  vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
-  #  wget
+    # Do not forget to add an editor to edit configuration.nix!
+    # The Nano editor is also installed by default.
+    # vim
+    # wget
   ];
 
   # Don't install all programs of the GNOME desktop.
@@ -160,6 +162,8 @@
     settings.PasswordAuthentication = false;
   };
 
+  nix.settings.auto-optimise-store = true;
+
   # Open ports in the firewall.
   # networking.firewall.allowedTCPPorts = [ ... ];
   # networking.firewall.allowedUDPPorts = [ ... ];