Hi… --depot=false is the real flag; that gives you one of the freebie legacy builders.
Some people find those a fair amount slower, though—particularly in the present era of CPU throttling.
(You can also make your own builders, with however much or little processing power you want, although then you have to pay for the resources provisioned.)
Finally, there is --local-only, if you have Docker installed on your development laptop/desktop. (There have been problems in the past with this on ARM, however.)
Hope this helps!