Por que você não usa o RVM (rvm.io)?
Estou com dificuldades para colocar o Ruby em funcionamento e recebo esta mensagem em muitas instalações
update-alternatives: error: alternative gem can't be master: it is a slave of ruby
A mensagem completa:
update-alternatives: error: alternative gem can't be master: it is a slave of ruby
dpkg: error processing rubygems1.8 (--configure):
subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of libruby1.8-extras:
libruby1.8-extras depends on libgems-ruby1.8 | rubygems1.8; however:
Package libgems-ruby1.8 is not installed.
Package rubygems1.8 is not configured yet.
dpkg: error processing libruby1.8-extras (--configure):
dependency problems - leaving unconfigured
Setting up libsqlite3-ruby1.8 (1.2.4-2.1) ...
No apport report written because the error message indicates its a followup error
>from a previous failure.Setting up libsqlite3-ruby (1.2.4-2.1) ...
Setting up libxml-simple-ruby (1.0.12-1) ...
Setting up rake (0.8.7-1) ...
dpkg: dependency problems prevent configuration of rails:
rails depends on libruby1.8-extras; however:
Package libruby1.8-extras is not configured yet.
dpkg: error processing rails (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error
from a previous failure.
>Setting up zip (3.0-2) ...
Errors were encountered while processing:
rubygems1.8
libruby1.8-extras
rails
E: Sub-process /usr/bin/dpkg returned an error code (1)
ubuntu 10.4 ruby1.9.1