OpenSSL errors for rubies installed with puppet-ruby

[sebroeder]

I have the following in modules/people/manifests/sebroeder/ruby.pp:

class people::sebroeder::ruby {

  class { 'ruby::build':
    ensure => 'v20150502'
  }

  ruby::version { '2.0.0-p645': }
}

The installed Ruby cannot open any https URLs and throws OpenSSL::SSL::SSLErrors:

RBENV_VERSION=2.0.0-p645 ruby -ropen-uri -e 'open("https://google.com").read'
/opt/rubies/2.0.0-p645/lib/ruby/2.0.0/net/http.rb:921:in `connect': SSL_connect returned=1 errno=0 state=unknown state: certificate verify failed (OpenSSL::SSL::SSLError)
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/net/http.rb:921:in `block in connect'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/timeout.rb:52:in `timeout'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/net/http.rb:921:in `connect'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/net/http.rb:862:in `do_start'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/net/http.rb:851:in `start'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/open-uri.rb:313:in `open_http'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/open-uri.rb:709:in `buffer_open'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/open-uri.rb:210:in `block in open_loop'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/open-uri.rb:208:in `catch'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/open-uri.rb:208:in `open_loop'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/open-uri.rb:149:in `open_uri'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/open-uri.rb:689:in `open'
    from /opt/rubies/2.0.0-p645/lib/ruby/2.0.0/open-uri.rb:34:in `open'
    from -e:1:in `<main>'

The same ruby works fine when I uninstall it and then install it again manually with either

rbenv install 2.0.0-p645 /opt/rubies/2.0.0-p645

or

ruby-build 2.0.0-p645 /opt/rubies/2.0.0-p645

This affects all rubies I tested (2.0.0-p645, 2.1.6, 2.2.2).