In a mixing bowl, combine the pumpkin, sugar, cinnamon, salt, nutmeg, and ginger. Add eggs. Beat lightly until mixture is just combined.
Gradually stir in evaporated milk; mix well. Pour into a greased 13x9x2-inch baking pan.
Sprinkle cake mix over pumpkin mixture; sprinkle with nuts. Drizzle with melted butter or margarine.
Bake in a 350 degree F oven for 1 to 1-1/4 hours or until edges are firm and center is almost set. Cool on wire rack. Store in the refrigerator. Makes 12 servings.