diff --git a/flake.nix b/flake.nix
index 500c18d..ee13bb9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -62,5 +62,6 @@
       '';
     };
 
+    formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.alejandra;
   };
 }