Comment 1 for bug 1625630

This also shows up when running Ubuntu 16.04 in Vagrant with a Mac OS host. Since Vagrant maps ./ from the [Mac OS] present working directory, the hardlink from `./parts/${PROJECT}/ubuntu/download/python3.5-minimal_...deb` is part of the Mac OS filesystem which the VM is not allowed to hardlink to [I believe]. The error message is the exact same as above.

To recreate my environment, use a Mac OS host with Vagrant running an Ubuntu 16.04 box and follow the snapcraft tutorial for Python snaps from within the Vagrant VM: https://tutorials.ubuntu.com/tutorial/snap-a-python-application. The error shows up on the `snapcraft prime` step.