Passenger install with conversion errors. Impact on nginx module?

Question

Under OS X 10.6.8 installing passenger, first under rbenv, then after uninstalling rbenv, also under rvm

Mini:~ user$ gem install passenger

is

Answer 1

The errors apparently are only relative to the documentation.

 gem install passenger --no-ri --no-rdoc 

does install passenger 4.0.48.

However, nginx would not install because of OS X version.

on Snow Leopard the latest version one can install, then have nginx installed is:

gem install passenger -v 4.0.5