rubygem-nokogiri from Virtualization:vagrant project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization:vagrant/openSUSE_Tumbleweed/Virtualization:vagrant.repo zypper refresh zypper install rubygem-nokogiri