Can't use Vagrant with libvirt, wrong gem date version

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1 
vagrant plugin install vagrant-libvirt
Installing the 'vagrant-libvirt' plugin. This can take a few minutes...
Vagrant failed to properly resolve required dependencies. These
errors can commonly be caused by misconfigured plugin installations
or transient network issues. The reported error is:

conflicting dependencies date (= 3.2.2) and date (= 3.3.4)
  Activated date-3.3.4
  which does not match conflicting dependency (= 3.2.2)

  Conflicting dependency chains:
    date (= 3.3.4), 3.3.4 activated

  versus:
    date (= 3.2.2)

  Gems matching date (= 3.2.2):
    date-3.2.2

VAGRANT_DISABLE_STRICT_DEPENDENCY_ENFORCEMENT=1 didn’t help.

2

Not to be rude, but would’t be more logical to ask in a vagrant forum? This seems to have nothing to do with the Distro.
Besides just opening the homepage of vagrant one sees your install command is wrong, missing arguments or path.

3

Heavy apologies for being a newbie, but I just figured that reading Arch’s Vagrant doc was sufficient. So sorry. Anyways, I followed the site, same problem. Guess I’ll ask Vagrant.

4

That should work, I installed vagrant-libvirt with it 3 days ago and it worked

VAGRANT_DISABLE_STRICT_DEPENDENCY_ENFORCEMENT=1 vagrant plugin install vagrant-libvirt