libzlib-ruby1.8 1.8.1+1.8.2pre4-1 (amd64 binary) in ubuntu hoary

Extension library to use zlib from Ruby 1.8
 Ruby/zlib is a extension library which makes Ruby to be able to use
 zlib library. It also provides the features for accessing gzipped
 files.
 .
 This package provides Ruby/zlib library for Ruby 1.8.