diff --git a/nix/treefmt.nix b/nix/treefmt.nix
index e8d4cf2eb..c167a3b29 100644
--- a/nix/treefmt.nix
+++ b/nix/treefmt.nix
@@ -32,7 +32,7 @@
         ruff.enable = true;
 
         # Bash
-        #shellcheck.enable = true; # lints shell scripts https://github.com/koalaman/shellcheck
+        shellcheck.enable = true; # lints shell scripts https://github.com/koalaman/shellcheck
       };
 
       # Automatically fix linting errors and formatting errors where possible