In a small bowl, mix the water and the flax and set aside for a few minutes and it will become thickened, like an egg.
In a small saucepan, heat the butter, sugar, and cocoa until all melted and smooth.
Stir in the flax mixture and the vanilla
Add in the graham crumbs, coconut, and pecans. If not thick enough, add up to a half cup more graham crumbs.
Press into the bottom of a parchment lined 8x8 pan.
Chill about 30 minutes or until somewhat set.