It depends how good/low level a programmer you are, but it's really not that hard to spin up your own impl. I did an (incomplete) Python multiprocessing like dealio in like 100 lines of code (https://github.com/c-blake/cligen/blob/master/cligen/procpoo...) just to make my `only.nim` run faster because libmagic/file are so CPU intensive. So, one way to annihilate your worries is to just roll your own.