diff --git a/pkgs/tools/nix/alejandra/default.nix b/pkgs/tools/nix/alejandra/default.nix
index 73f114d96ef..0e5d59ee8f8 100644
--- a/pkgs/tools/nix/alejandra/default.nix
+++ b/pkgs/tools/nix/alejandra/default.nix
@@ -28,5 +28,6 @@ rustPlatform.buildRustPackage rec {
     changelog = "https://github.com/kamadorueda/alejandra/blob/${version}/CHANGELOG.md";
     license = licenses.unlicense;
     maintainers = with maintainers; [ _0x4A6F kamadorueda sciencentistguy ];
+    mainProgram = "alejandra";
   };
 }