[DRE-maint] Bug#896904: [vagrant] vagrant plugin can't install plugin - Bundler reports vagrant-libvirt at 0.0.41, but 0.0.43-2 is installed

[Simon Hollenbach]

This happens here too on buster, I cannot install any vagrant plugin. 
Running 'vagrant install <someplugin>' reports vagrant-libvirt at 
0.0.41, this is what occurs in the original bug report, too.
 >  vagrant-libvirt (> 0), 0.0.41 activated

However, listing the plugins, the correct version 0.0.43 (from 0.0.43-2) 
is shown.

   $ vagrant plugin list
   vagrant-libvirt (0.0.43, system)

   $ dpkg -s vagrant-libvirt | grep ^Version
   Version: 0.0.43-2

I have no plugins manually installed at all right now as I thought 
throwing away all my local caches might fix things, because I recently 
upgraded from stretch and hadn't tried to use vagrant since then.

I also purged and reinstalled vagrant and all auto-removable 
dependencies, to no avail.

Best regards,
Simon