Preheat oven to 300 degrees F.

Cut croissant into 1-inch cubes.

Spread croissant cubes evenly along the bottom of a 9x13 inch baking pan.

In a large bowl, mix eggs, evaporated milk, coconut milk, sugar, and water.

Whisk until the mixture has a smooth custard texture.

Pour the custard mixture evenly over the bread cubes.

Sprinkle shredded coconut evenly over the custard-soaked bread.

Sprinkle chopped macadamia nuts evenly over the coconut.

Bake in the preheated oven for 1 1/2 to 2 hours, or until the custard is set and the top is golden brown.

Let cool slightly before serving.