Can't install ox gem

[user21]

Hello! I can't install ox gem( I try different versions from (1.9.2 to 2.0.0).

gem install ox

ERROR: Error installing ox:
ERROR: Failed to build gem native extension.

    /usr/local/redmine/ruby/bin/ruby extconf.rb

Creating Makefile for ruby version 1.9.3 on x86_64-linux <<<<<
creating Makefile
extconf.rb:62:in ``': No such file or directory - make clean (Errno::ENOENT)
from extconf.rb:62:in`

'

Is it possible resolve this problem? Thank's for watching!

[cfis]

I think you have the wrong github project, this is for libxml-ruby.