FreeBSD has a Linux compatibility layer, so I'd expect flow-bin to be able to run on it. Alas, I got an exception after tagging the linux bin as linux elf:
Unhandled exception: Unix.Unix_error(Unix.EACCESS, "open", "/dev/null")
But /dev/null has proper permissions:
crw-rw-rw- root wheel
Or? Setting it to 777 does not help.
Edit: running as root, still fails, log shows "Out of shared memory" from a Hack library? I'm assuming this specific library does not work on FreeBSD, being to low-level perhaps.