diff --git a/pkgs/applications/misc/waylock/default.nix b/pkgs/applications/misc/waylock/default.nix
index ba2a97534d36..9445ed8f1f92 100644
--- a/pkgs/applications/misc/waylock/default.nix
+++ b/pkgs/applications/misc/waylock/default.nix
@@ -42,6 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
     description = "A small screenlocker for Wayland compositors";
     license = lib.licenses.isc;
     maintainers = with lib.maintainers; [ jordanisaacs ];
+    mainProgram = "waylock";
     platforms = lib.platforms.linux;
   };
 })