In a medium sized bowl, mix the peaches with the juice in the pan with the cinnamon, nutmeg and brown sugar. Mix. Pour this in the bottom of a crockpot (anything larger than a 4 quart crockpot will work). Sprinkle the cake mix evenly over the top of the peaches, covering them entirely.
Either grate cold (frozen is easier to grate) butter over the top of the cake mix, or lay thin slices of butter to cover the cake mix.
Set to high and allow it to cook for 3 hours. Remove the lid and allow the cobbler to cool slightly before scooping out so it can solidify a bit more. Serve with your favorite ice cream while the cobbler is still warm.