I don't think they employed any niggers (as slaves of course) in the construction of the pyramids. The Sahara desert is the largest desert in the world and no nigger is going to take that journey up north (in addition, niggers are cowardly vermins that wouldn't stand a chance against the lions, monkeys, snakes and hippos in the wild).
It would've been cheaper and easier for the Egyptian Kings/Queens to get slave labor right from their own country by enslaving the poorest groups and then rounding up a few slaves from neighboring countries in what's now Israel, Jordan, Lebanon, Saudi Arabia, Greece, Turkey and Italy.
Also, assuming if they did enslave niggers in the construction of the pyramids, the niggers would've had knowledge of the construction to be able to build something similar in their own shithole countries. Of course, there's no evidence that niggers had the knowledge of the Egyptians to do anything similar. When the British started exploring and tried to colonize/modernize various countries/continents, it was then that they discovered niggers were still living in the mud age.