When I compile software inside a shared folder, ar command says /usr/bin/ar: ../lib/libxxx.a: Operation not permitted

strace:

open("lib/stef86TF", O_RDWR|O_CREAT|O_TRUNC, 0666) = -1 EPERM (Operation not permitted)

If I move the folder into /tmp/, everything is ok.
I'm using Sierra 10.12.5, Vagrant + docker provider
xhyve with virtio-9p option