Stuff about managing Ruby & rvm

Warning ‘Ignoring… because its extensions are not built’

The message is:

Ignoring atomic-1.1.101 because its extensions are not built.  Try: gem pristine atomic --version 1.1.101

Try:

gem 2>&1 | perl -ne '/Try: gem pristine ([^ ]+)/ && print $1 . " "' | xargs gem pristine