diff --git a/formatter.nix b/formatter.nix
index 1e2e1c35..fc884fef 100644
--- a/formatter.nix
+++ b/formatter.nix
@@ -37,7 +37,7 @@
         options = [
           "-eucx"
           ''
-            ${lib.getExe pkgs.ruff} --fix "$@"
+            ${lib.getExe pkgs.ruff} check --fix "$@"
             ${lib.getExe pkgs.ruff} format "$@"
           ''
           "--" # this argument is ignored by bash