I dropped this hillbilly cooler on to keep the temps under control while doing compiles:
It’s just a length of aluminium bar dropped on top of the CPU that wicks the heat away, it’s also got a fair amount of thermal inertia so deals well with burst of heat buildup. This is just temporary until the NB radiator arrives.
Another thing to consider, which I did to try and keep the temps down, is not to use -j4 in the build (if you’re building with make) but keep it on a single core, this will take a bit longer but should reduce heat buildup.