gistfile1.rb

# This shows the new way that provider-specific configuration will be done,
# starting with VirtualBox customizations. Historically, these have been
# top-level configurations on the Vagrant configuration but since it only
# applies to VirtualBox, it has been hoisted into provider configuration.
#
# Since Vagrant 1.1+ will maintain backwards compatibility, old Vagrantfiles
# still work as expected.

# OLD (1.0.x):
Vagrant::Config.run do |config|
  config.vm.box = "base"
  
  config.vm.customize ["modifyvm", :id, "--memory", "1024"]
end

# NEW (1.1+):
Vagrant.configure("2") do |config|
  config.vm.box = "base"
  
  config.vm.provider :virtualbox do |vb|
    vb.customize ["modifyvm", :id, "--memory", "1024"]
  end
end