diff --git a/README.org b/README.org
index e203544..5d6fdba 100644
--- a/README.org
+++ b/README.org
@@ -820,7 +820,9 @@ Set treesit to fontify all elements, default was 3 (out of 4)
     :hook (prog-mode)
     :custom (apheleia-remote-algorithm 'local)
     :config
-    (add-to-list 'apheleia-mode-alist '(python-ts-mode . ruff)) 
+    (add-to-list 'apheleia-formatters '(alejandra . ("alejandra")))
+    (add-to-list 'apheleia-mode-alist '(nix-mode . alejandra))
+    (add-to-list 'apheleia-mode-alist '(python-ts-mode . ruff))
     (add-to-list 'apheleia-mode-alist '(python-mode . ruff)))
 #+end_src
 ** Flymake