How can I install ruby-xslt?



I can’t figure how I to install ruby-xslt (downloaded from this page:

I am using MS Windows, ruby is installed using the 1-click installer.

When I decompress the archive, i can see there is a file named
I am a newbie, but I suppose this extconf.rb file has to be used to
install ?

When I launch extconf.rb, I get the following message:


checking for inflate() in z.lib… no extconf failure: need zlib

I have no clue what I should do to resolve this problem.
XSLT functionnalities are very important for me so any help would be
greatly appreciated.