Unable to build_image when using Docker provisioner on vagrant

When I try to use the Docker provisioning in Vagrant

config.vm.provision "docker" do |d|
  d.build_image "/vagrant/app"
end

I get the error

There are errors in the configuration of this machine. Please fix the following errors and try again:
VagrantPlugins::Docker::Config:
  * The following settings shouldn't exist: build_image 

when running vagrant up

I'm able to run the build manually inside a VBox VM