Vagrant 同步文件夹权限

我在 Vagrant 中设置了一个同步文件夹，从我的 Windows 主机到来宾.最初对文件的权限太开放，所以我添加了以下挂载选项:

I have set up a synced folder in Vagrant, from my Windows host to the guest. Initially the permissions on the files were too open so I added the following mount options:

config.vm.synced_folder "../my-folder", "/home/vagrant/my-folder",
    mount_options: ["dmode=775,fmode=664"]

但是，我需要为此文件夹中的单个文件添加执行权限.chmod +x file 无效.有没有办法允许共享文件夹中的单个项目可执行/对文件夹中的其余项目具有不同的权限?

However, I need to add execute permissions on a single file within this folder. chmod +x file has no effect. Is there a way to allow a single item in a shared folder to be executable/have different permissions to the rest of the items in the folder?