generic/gentoo Vagrant box

How to use this box with Vagrant: 

Vagrant.configure("2") do |config|
  config.vm.box = "generic/gentoo"
  config.vm.box_version = "1.2.21"
end
vagrant init generic/gentoo \
  --box-version 1.2.21
vagrant up

v1.2.21

This version was created over 6 years ago.

A build environment for use in cross platform development.

3 providers for this version.
  • hyperv
    unknown Hosted by Vagrant Cloud (900 MB)
  • virtualbox
    unknown Hosted by Vagrant Cloud (1.07 GB)
  • vmware_desktop
    unknown Hosted by Vagrant Cloud (928 MB)