Jessie 8.7 was released on Jan 14th and hashicorp's debian/contrib-jessie64 has been updated as well.
Resulting in the following when provisioning from scratch on the jessie-migration branch:
MediaWiki-Vagrant requires a Debian 8.6 guest OS Your guest OS reports: Distributor ID: Debian Release: 8.7 Codename: jessie Please rebuild using `vagrant destroy -f; vagrant up` NOTE: this will cause you to lose any data saved in the VM.