You don't want your Porsche car to stand over this 24/7. Not exactly the best for a car like yours.
Look up "
driveway protection mat" in your are and see if you can find one that sell those. Often offered in strong/thick composites and relatively cheap. Cut ground humidity and others, make working on car easier, keeps the land free of petroleum also. All good reasons.
Might not work for jack support, but certainly make life easier for both you and the car.
Nice pebbles, driveway, and little place you got there none the less
