sup talk - Apr 2010 - Error installing gem install sup on CentOS.

Hi, 

I have installed the ruby dependencies on my CentOS  2.6.18-164.11.1.el5
system. The following are the sequence of commands that I used to download
ruby related packages. 

For installing ruby and ruby related packages 
>> yum install -y ruby
>> yum install -y ruby-devel ruby-docs ruby-ri ruby-irb ruby-rdoc 
I did not have gem installed and hence i used wget to install gems  and
untarred and installed the setup.rb
>> wget http://rubyforge.org/frs/download.php/45905/rubygems-1.3.1.tgz
>> tar xzvf rubygems-1.3.1.tgz
>> cd  rubygems-1.3.1.tgz
>> sudo ruby ./setup.rb
Once I installed this, I had gem on my system. So time for installing sup.
>> sudo gem install sup
Building native extensions.  This could take a while...

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

rake RUBYARCHDIR=/usr/lib/ruby/gems/1.8/gems/xapian-full-1.1.3.4/lib
RUBYLIBDIR=/usr/lib/ruby/gems/1.8/gems/xapian-full-1.1.3.4/lib
sh: rake: command not found

Gem files will remain installed in
/usr/lib/ruby/gems/1.8/gems/xapian-full-1.1.3.4 for inspection.
Results logged to
/usr/lib/ruby/gems/1.8/gems/xapian-full-1.1.3.4/gem_make.out

I got the above error.? 
what am i missing
Can any one help me out with this ? 

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Well you do not have rake installed:
> rake RUBYARCHDIR=/usr/lib/ruby/gems/1.8/gems/xapian-full-1.1.3.4/lib
> RUBYLIBDIR=/usr/lib/ruby/gems/1.8/gems/xapian-full-1.1.3.4/lib
> sh: rake: command not found
rake is "RAKE - Ruby Make" http://rake.rubyforge.org/ 
I bet there is a CentOS package for rake

regards

Excerpts from ghanashyam''s message of Fri Apr 23 01:57:48 -0400
2010:
> sh: rake: command not found
I don''t use CentOS, so this is only a wild guess, but you might
have to do one of the following:

  gem install rake

or

  yum install ruby-rake