vagrant with multiple sync’d folders [closed]

2021 Update:

In 2021 no need for unique Id or being nfs, just list your synced folders:

config.vm.synced_folder ".", "/vagrant/Sites"
config.vm.synced_folder "../Code", "/vagrant/Code"

Original answer:

I just needed to set a unique ID for each mount, and then reload the vagrant box.

# Use NFS for the shared folder
config.vm.synced_folder ".", "/vagrant/Sites",
      id: "sites", # <--- this ID must be unique
      :nfs => true,
      :mount_options => ['nolock,vers=3,udp,noatime']

# Use NFS for the shared folder
config.vm.synced_folder "../Code", "/vagrant/Code",
      id: "code", # <--- different from this one
      :nfs => true,
      :mount_options => ['nolock,vers=3,udp,noatime']