How to use this box with Vagrant:
Vagrant.configure("2") do |config|
config.vm.box = "dene/openbsd57"
config.vm.box_version = "1.0.0"
end
vagrant init dene/openbsd57 \
--box-version 1.0.0
vagrant up
This version was created about 9 years ago.
OpenBSD 5.7 version 1.0.0