diff --git a/pkgs/applications/misc/gcal/default.nix b/pkgs/applications/misc/gcal/default.nix
index a6b98ccccf08..8f345f39b534 100644
--- a/pkgs/applications/misc/gcal/default.nix
+++ b/pkgs/applications/misc/gcal/default.nix
@@ -34,5 +34,6 @@ stdenv.mkDerivation rec {
     license = lib.licenses.gpl3Plus;
     platforms = lib.platforms.unix;
     maintainers = [ lib.maintainers.romildo ];
+    mainProgram = "gcal";
   };
 }