Error in Puppet agent 3.8 installation on cent OS 7.5 without internet

Question

I am installing puppet agent 3.8.7 on cent OS 7.5. The OS was installed on a new VM and it is not connected to internet. I have created a yum repo which points to pulp repository. Below are the contents of my yum repo for puppet -

[root@server --- ~]# cat /etc/yum.repos.d/puppetlabs.repo
[puppetlabs-products]
name=Puppet Labs Products El 7 - $basearch
baseurl=http://136.243.83.142/pulp/repos/puppetlabs-products-el6
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppetlabs
       file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppet
enabled=1
gpgcheck=1

[puppetlabs-deps]
name=Puppet Labs Dependencies El 7 - $basearch
baseurl=http://136.243.83.142/pulp/repos/puppetlabs-deps-el6/
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppetlabs
       file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppet
enabled=1
gpgcheck=1

when I run 'yum install puppet', I get below error. I have ruby 2.0 installed but the puppet packages reuquire ruby 1.8. When I checked the puppetlabs site, they mention puppet supports ruby 2.0. So, how do I proceed now, given the fact that my server is in internal domain and not connected to internet. Below is the error I get on executing 'yum install puppet' -

[root@server --- ~]# yum install puppet
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
epel                                                                                                                                             | 2.5 kB  00:00:00
puppetlabs-deps                                                                                                                                  | 1.8 kB  00:00:00
puppetlabs-products                                                                                                                              | 1.8 kB  00:00:00
Resolving Dependencies
--> Running transaction check
---> Package puppet.noarch 0:3.8.7-1.el6 will be installed
--> Processing Dependency: hiera >= 1.0.0 for package: puppet-3.8.7-1.el6.noarch
--> Processing Dependency: facter >= 1:1.7.0 for package: puppet-3.8.7-1.el6.noarch
--> Processing Dependency: ruby(selinux) for package: puppet-3.8.7-1.el6.noarch
--> Processing Dependency: ruby-augeas for package: puppet-3.8.7-1.el6.noarch
--> Processing Dependency: ruby-shadow for package: puppet-3.8.7-1.el6.noarch
--> Running transaction check
---> Package facter.x86_64 1:2.4.6-1.el6 will be installed
---> Package hiera.noarch 0:1.3.4-1.el6 will be installed
---> Package puppet.noarch 0:3.8.7-1.el6 will be installed
--> Processing Dependency: ruby(selinux) for package: puppet-3.8.7-1.el6.noarch
---> Package ruby-augeas.x86_64 0:0.4.1-3.el6 will be installed
--> Processing Dependency: ruby(abi) = 1.8 for package: ruby-augeas-0.4.1-3.el6.x86_64
--> Processing Dependency: libruby.so.1.8()(64bit) for package: ruby-augeas-0.4.1-3.el6.x86_64
---> Package ruby-shadow.x86_64 1:2.2.0-2.el6 will be installed
--> Processing Dependency: libruby.so.1.8()(64bit) for package: 1:ruby-shadow-2.2.0-2.el6.x86_64
--> Finished Dependency Resolution
Error: Package: puppet-3.8.7-1.el6.noarch (puppetlabs-products)
           Requires: ruby(selinux)
Error: Package: ruby-augeas-0.4.1-3.el6.x86_64 (puppetlabs-deps)
           Requires: libruby.so.1.8()(64bit)
Error: Package: 1:ruby-shadow-2.2.0-2.el6.x86_64 (puppetlabs-deps)
           Requires: libruby.so.1.8()(64bit)
Error: Package: ruby-augeas-0.4.1-3.el6.x86_64 (puppetlabs-deps)
           Requires: ruby(abi) = 1.8
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest