In system(paste(cmd, "-n")) : 'make' not found. And slow speed

-03 is already in the Makevars file.
OK…based on this thread Buying a new computer - best hardware for fast Stan performance I would have thought that the new 32 core computer would have run at least a little faster… no?
At least I can run 7 models on 7 different R sessions in the same amount of time that I run 1.