Ruby - Installing gem debugger

Hi fellas!

Tryin this:

$ gem install debugger

Returned this:

checking for vm_core.h... no
checking for vm_core.h... no
Makefile creation failed
**************************************************************************
No source for ruby-1.9.3-p286 provided with debugger-ruby_core_source gem.
**************************************************************************

Reading the error I tried this:

$ gem install debugger -- --with-ruby-include=/home/$(echo $USER)/.rvm/src/ruby-$(ruby -v | cut -d" " -f2)

Problem solved.

Adios!