After installing vagrant and rubygem-vagrant-mutate with pkg(8) vagrant-mutate plugin is not available: root@freebsd # vagrant plugin list No plugins installed. root@freebsd # pkg info | grep vagrant rubygem-vagrant-mutate-1.2.0_1 Convert vagrant boxes to work with different providers vagrant-2.1.5 Vagrant Virtual Machine Manager root@freebsd # ruby --version ruby 2.4.4p296 (2018-03-28 revision 63013) [amd64-freebsd12] root@freebsd # uname -a FreeBSD freebsd 12.0-ALPHA4 FreeBSD 12.0-ALPHA4 #0 r338410: Fri Aug 31 18:21:46 UTC 2018 root@releng3.nyi.freebsd.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
It's the same after installing vagrant and vagrant-plugin-mutate from ports.
vagrant-bhyve isn't visible either.
I don't think it's possible to fix this without patching vagrant, since it doesn't read the list of gems installed in the system. It only reads ${HOME}/.vagrant.d/plugins.json. The only thing you can do is edit that file after installing the packages.