Preheat the oven to 350°F (175°C) and lightly grease a 9×13-inch baking dish.
Spread the apple pie filling evenly into the baking dish.
Sprinkle the cinnamon and nutmeg evenly over the apples.
Evenly sprinkle the dry yellow cake mix over the apple filling without stirring.
Slowly drizzle the melted butter over the cake mix, covering as much of the surface as possible.
Bake for 45 to 50 minutes, or until the topping is golden brown and the apple filling is bubbling around the edges.
Let the dump cake cool for 10 to 15 minutes before serving.
Serve warm with vanilla ice cream, whipped cream, caramel sauce, or chopped pecans if desired.