diff --git a/pkgs/tools/X11/wpgtk/default.nix b/pkgs/tools/X11/wpgtk/default.nix
index f5489aa8b82f..ae7a106a7899 100644
--- a/pkgs/tools/X11/wpgtk/default.nix
+++ b/pkgs/tools/X11/wpgtk/default.nix
@@ -50,5 +50,6 @@ python3Packages.buildPythonApplication rec {
     license = licenses.gpl2Only;
     platforms = platforms.linux;
     maintainers = [ maintainers.melkor333 maintainers.cafkafk ];
+    mainProgram = "wpg";
   };
 }