diff --git a/system/emacs.nix b/system/emacs.nix
index b1ff6ab5..cc1c7854 100644
--- a/system/emacs.nix
+++ b/system/emacs.nix
@@ -27,8 +27,8 @@
     nixfmt
     black
     isort
+    python3Packages.pyflakes
     fprettify
-    ruff
     rustfmt
     stylua
     shfmt