diff --git a/Vagrantfile b/Vagrantfile
index ebe5693..de71652 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -16,13 +16,9 @@ SSH_FORWARD  = settings['SSH_FORWARD']  || false
 
 # Default to shell environment variable: PLAYBOOK (priority #1)
 PLAYBOOK=ENV["PLAYBOOK"]
-if !PLAYBOOK
+if !PLAYBOOK || PLAYBOOK.empty?
   # PLAYBOOK setting in .vagrant.yml (priority #2)
   PLAYBOOK = settings['PLAYBOOK'] || false
-  if !PLAYBOOK || PLAYBOOK.empty?
-    puts "[VAGRANTFILE ERROR]: Set PLAYBOOK setting in .vagrant.yml"
-    abort
-  end
 end
 
 Vagrant.configure("2") do |config|
@@ -31,10 +27,10 @@ Vagrant.configure("2") do |config|
   config.ssh.forward_agent = SSH_FORWARD
 
   # Libvrit provider
-  config.vm.provider :libvirt do |libvirt|
-    libvirt.cpus   = VAGRANT_CPUS
-    libvirt.memory = VAGRANT_MEM
-  end
+  #config.vm.provider :libvirt do |libvirt|
+  #  libvirt.cpus   = VAGRANT_CPUS
+  #  libvirt.memory = VAGRANT_MEM
+  #end
 
   # Virtualbox provider
   config.vm.provider :virtualbox do |vbox|