diff --git a/flake.nix b/flake.nix
index 6f21c32..64949fc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -43,7 +43,7 @@
           };
 
           devShells.default = pkgs.callPackage ./shell.nix {
-            packages = [ config.treefmt.build.wrapper ];
+            packages = [ config.treefmt.build.wrapper pkgs.shellcheck ];
           };
 
           checks =