diff --git a/flake.nix b/flake.nix
index ca2d309..f695a2c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,6 +45,7 @@
           license = final.lib.licenses.unlicense;
           maintainers = [final.lib.maintainers.kamadorueda];
           platforms = final.lib.systems.doubles.all;
+          mainProgram = "alejandra";
         };
       };
     };