On Sun, 3 Apr 2022, netrixtardis wrote: > or a safe default of > NUMJOBS=${NUMJOBS:$(($(nproc) - 1))} That's an *unsafe* default. What does make do when you run that on a single-core machine? It gets a "-j0" argument, that's either an error, or it means the same as "-j" by itself (meaning *infinite* jobs).