Ruby: nokogiri requires Ruby version < 3.1.dev, >= 2.5

Question

I'm trying to install the Vagrant plugin vagrant-libvirt on Debian 10. However, Debian 10 does only have Ruby 2.5 and I get the following error message each time I trigger vagrant plugin install vagrant-libvirt:

nokogiri requires Ruby version < 3.1.dev, >= 2.5.

I've installed all developer dependencies (apt-get build-dep vagrant ruby-libvir, apt-get install libxslt-dev libxml2-dev libvirt-dev zlib1g-dev ruby-dev) as required by the manual, but still get this error. Can anyone help me please?

Answer 1

First of all, please upgrade vagrant, because it ships with its own ruby verison.