ruby1.8-dev 1.8.4-1ubuntu1.1 (amd64 binary) in ubuntu dapper

 Ruby is the interpreted scripting language for quick and easy
 object-oriented programming. It has many features to process text
 files and to do system management tasks (as in perl). It is simple,
 straight-forward, and extensible.
 .
 This package contains the header files, necessary to make extension
 library for Ruby 1.8.