RVM Ruby 1.9.1 install can't locate zlib but its runtime and dev library are there

Question

Trying to get Ruby 1.9.1 up and running with RVM on a fresh install (fedora).

After doing rvm install 1.9.1, the rubygems error logs show that zlib can

Answer 1

In modern version of rvm package argument have been replaced pkg argument.

Now, in order to install zlib package for rvm need:

rvm pkg install zlib