Burn it down on your way out !
Force the feral savages to confront their total ignorance and cluelessness at rebuilding what their white betters created.
They really needn’t even take the trouble, the new black overlords will Detroit it themselves. Already South Africa can’t keep a consistent power supply because they refuse to hire enough qualified whites to keep the power flowing, so brownouts are now a common occurrence. This, in what was formerly the only First World nation on the African continent, because-tada-whites running the country benefitted everyone. (IE, black infant mortality rates have risen, black longevity rates have lowered, crime is rampant. Google the story of their fiasco with their submarines. One had its battery cables incorrectly connected. One crashed against a harbor wall. The third mysteriously nose-dived to the seabed)