diff --git a/hosts/ni/config/nixpkgs/config.nix b/hosts/ni/config/nixpkgs/config.nix
new file mode 100644
index 00000000..4913dd09
--- /dev/null
+++ b/hosts/ni/config/nixpkgs/config.nix
@@ -0,0 +1,10 @@
+{
+  allowUnfree = true;
+
+  # These are wrapper options for Firefox.
+  firefox = {
+    enableBrowserpass = true;
+    enableTridactylNative = true;
+    enableFxCastBridge = true;
+  };
+}
diff --git a/hosts/ni/default.nix b/hosts/ni/default.nix
index 00a9c083..823c9440 100644
--- a/hosts/ni/default.nix
+++ b/hosts/ni/default.nix
@@ -131,11 +131,7 @@
   programs.adb.enable = true;
 
   # Basically, the most basic nixpkgs configuration.
-  environment.etc."nix/nixpkgs-config.nix".text = ''
-    {
-      allowUnfree = true;
-    }
-  '';
+  environment.variables.NIXPKGS_CONFIG = lib.mkForce ./config/nixpkgs/config.nix;
 
   environment.systemPackages = with pkgs; [
     # Some sysadmin thingamajigs.