diff --git a/pkgs/development/python-modules/brother-ql/default.nix b/pkgs/development/python-modules/brother-ql/default.nix
index c7b727c73a5f..f6cfe5868209 100644
--- a/pkgs/development/python-modules/brother-ql/default.nix
+++ b/pkgs/development/python-modules/brother-ql/default.nix
@@ -33,5 +33,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/pklaus/brother_ql";
     license = licenses.gpl3;
     maintainers = with maintainers; [ grahamc ];
+    mainProgram = "brother_ql";
   };
 }