ruby-dev 4.5 (i386 binary) in ubuntu oneiric

 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 provides the header files, necessary to make extension
 library for Ruby.
 .
 This package is a dependency package, which depends on Debian's default
 Ruby version (currently 1.8.x).