diff --git a/pkgs/games/the-powder-toy/default.nix b/pkgs/games/the-powder-toy/default.nix
index 5d240a9fe91b..11fadcb04c9f 100644
--- a/pkgs/games/the-powder-toy/default.nix
+++ b/pkgs/games/the-powder-toy/default.nix
@@ -31,5 +31,6 @@ stdenv.mkDerivation rec {
     platforms = [ "i686-linux" "x86_64-linux" "x86_64-darwin" ];
     license = licenses.gpl3;
     maintainers = with maintainers; [ abbradar siraben ];
+    mainProgram = "powder";
   };
 }