Comment # 10 on bug 1050007 from Robert Munteanu

I think you're building against an old version of rubygem-childprocess and
therefore the package is not installable:

$ ls -1 vagrant*.rpm
vagrant-1.9.7-18.2.x86_64.rpm
vagrant-bash-completion-1.9.7-18.2.noarch.rpm
vagrant-vim-1.9.7-18.2.noarch.rpm

$ sudo zypper in vagrant*.rpm
Loading repository data...
Reading installed packages...
Resolving package dependencies...

Problem: nothing provides rubygem(ruby:2.4.0:childprocess:0.6) >= 0.6 needed by
vagrant-1.9.7-18.2.x86_64
 Solution 1: do not install vagrant-1.9.7-18.2.x86_64
 Solution 2: break vagrant-1.9.7-18.2.x86_64 by ignoring some of its
dependencies
c

$ rpm -q ruby2.4-rubygem-childprocess 
ruby2.4-rubygem-childprocess-0.7.0-1.3.x86_64