diff --git a/quinn/etc/nixos/configuration.nix b/quinn/etc/nixos/configuration.nix
index af9b8d1..fccd637 100644
--- a/quinn/etc/nixos/configuration.nix
+++ b/quinn/etc/nixos/configuration.nix
@@ -94,6 +94,7 @@
     htop
     lsof
     #mongodb
+    ndisc6
     neovim
     nginx
     poetry
@@ -113,6 +114,19 @@
     "unifi-controller"
   ];
 
+  # Enable the helpful "command-not-found" that tells which packages may have the command in question.
+  # This makes system configuration troubleshooting much faster since I can attempt a basic command 'foo'
+  # and if 'foo' isn't installed it suggests an installation target.
+  # If you run 'command-not-found' and it complains about
+  #  DBI connect('dbname=/nix/var/nix/profiles/per-user/root/channels/nixos/programs.sqlite','',...) failed: unable to open database file at /run/current-system/sw/bin/command-not-found line 13.
+  #  cannot open database `/nix/var/nix/profiles/per-user/root/channels/nixos/programs.sqlite' at /run/current-system/sw/bin/command-not-found line 13.
+  #
+  # Then you can recreate the SQLite DB with 'sudo nix-channel --list' and making sure a channel like 'nixos https://nixos.org/channels/nixos-24.05' is present.
+  # Anything that ends in 'nixos-...' should work.
+  # Then run 'sudo nix-channel --update'
+  # See https://discourse.nixos.org/t/command-not-found-unable-to-open-database/3807/7
+  programs.command-not-found.enable = true;
+
   # Some programs need SUID wrappers, can be configured further or are
   # started in user sessions.
   # programs.mtr.enable = true;
@@ -276,7 +290,7 @@
     } {
       addressConfig = {
         Address="::/0";
-	Scope="global";
+        Scope="global";
       };
     }];