There are two approaches: * Either use `spawn` and essentially watch the process in a separate thread, or... * Use `asyncproc` from the `asynctools` package (<https://github.com/cheatfate/asynctools/blob/master/asynctools/asyncproc.nim>) and watch the process asynchronously.
I use the latter for my tester in httpbeast: <https://github.com/dom96/httpbeast/blob/master/tests/tester.nim>
