diff --git a/buildserver/Vagrantfile b/buildserver/Vagrantfile
index 013b5382..392d3df6 100644
--- a/buildserver/Vagrantfile
+++ b/buildserver/Vagrantfile
@@ -43,8 +43,12 @@ Vagrant.configure("2") do |config|
         libvirt.nic_model_type = configfile["libvirt_nic_model_type"]
       end
     end
-    config.vm.synced_folder './', '/vagrant', type: '9p'
-    synced_folder_type = '9p'
+    if configfile.has_key? "synced_folder_type"
+      synced_folder_type = configfile["synced_folder_type"]
+    else
+      synced_folder_type = '9p'
+    end
+    config.vm.synced_folder './', '/vagrant', type: synced_folder_type
   else
     abort("No supported VM Provider found, set vm_provider in Vagrantfile.yaml!")
   end
diff --git a/examples/makebuildserver.config.py b/examples/makebuildserver.config.py
index 9d1dae31..cb47f95f 100644
--- a/examples/makebuildserver.config.py
+++ b/examples/makebuildserver.config.py
@@ -85,3 +85,10 @@
 #
 # libvirt_disk_bus = 'sata'
 # libvirt_nic_model_type = 'rtl8139'
+
+# Sometimes, it is not possible to use the 9p synced folder type with
+# libvirt, like if running a KVM buildserver instance inside of a
+# VMware ESXi guest.  In that case, using NFS or another method is
+# required.
+#
+# synced_folder_type = 'nfs'