cannot load such file — zlib even after using rvm pkg install zlib

Question

I installed zlib package and ruby 1.9.3 using rvm, but whenever I try to install gems it says cannot load such file -- zlib

The commands I used to insta

Answer 1

Ruby has a bunch of package dependencies like the one on zlib-devel. They're nasty because there's nothing to indicate you need the library until get some obscure error message while trying to do something routine.

The solution is to use rvm. Use it even if you only need one version of ruby. Why? Because then you can do

rvm requirements

This will probe your particular OS and produce a set of commands you can copy back to the command line to install those missing packages.