diff --git a/home-manager/firefox/config/browser-features.nix b/home-manager/firefox/config/browser-features.nix
index d56b99e..70b4c44 100644
--- a/home-manager/firefox/config/browser-features.nix
+++ b/home-manager/firefox/config/browser-features.nix
@@ -128,4 +128,6 @@
   "browser.ping-centre.telemetry" = false;
   "devtools.onboarding.telemetry.logged" = false;
   "accessibility.force_disabled" = 1;
+  # Don't have speech-dispatcher (speechd) enabled, so this wont work
+  "media.webspeech.synth.enabled" = false;
 }
diff --git a/modules/nix/settings.nix b/modules/nix/settings.nix
index c52bdcf..1ed4290 100644
--- a/modules/nix/settings.nix
+++ b/modules/nix/settings.nix
@@ -25,6 +25,7 @@ in
 
     nix = {
       optimise.automatic = cfg.optimise;
+      settings.allowed-users = [ "root" "@wheel" ];
       settings.experimental-features = [
         "nix-command"
         "flakes"