diff --git a/buildserver/Vagrantfile b/buildserver/Vagrantfile
index c182e07e..c353b506 100644
--- a/buildserver/Vagrantfile
+++ b/buildserver/Vagrantfile
@@ -52,6 +52,10 @@ Vagrant.configure("2") do |config|
     config.vm.synced_folder configfile["cachedir"], '/vagrant/cache',
       create: true, type: synced_folder_type
   end
+  # Make sure dir exists to mount to, since buildserver/ is
+  # automatically mounted as /vagrant in the guest VM. This is more
+  # necessary with 9p synced folders
+  Dir.mkdir('cache') unless File.exists?('cache')
 
   # cache .deb packages on the host via a mount trick
   if configfile.has_key? "aptcachedir"