The Dust Collector — E.M. McConnell

Darius has lived on the desert prison planet Woestynn for longer than he wants to remember. His days are dreary, dangerous and dark, collecting ore to supply the prison, to claim his rations of food and hydration tablets. But Darius does not work to pay towards a cell, as other prisoners do. Darius chooses to make a stand alone, out in the desert. Because you can't choose when you die, but you can choose how you die.