The White Spot

The planet did not look promising, but they had no choice. When a ship's drive blows between star systems, it has to be fixed. If metal parts must be recast and machined, and burned-out wiring has to be pieced together and insulated by hand, the job takes literally months. And if, then, getting home is a matter of more months of journeying with a drive that still limps, while coughing and cutting off for seconds or until it is tinkered with -- why, the traveler has to find some way to renew his food supply. Even on an alien planet. Even on an alien planet with intelligent life...