Since this is a c extension to ruby, you need to compile this. To do so, 
you should do the following (in the directory where you unpacked the 
files)

    ruby extconf.rb   #creates the Makefile
    make              #compiles the extension
    make install      #installs the extension on the system
                      #needs to be run with root privileges

In theory, this should work. I tried to do this before replying to your 
post, however, but got a compilation error in the make step. The readme 
file says that linux is supported (unlike the 0.0.1 release which only 
supports FreeBSD), so there may be something wrong with my system, or 
the problem might be due to the fact that this is an alpha release.

I'm sorry I can't help you more with this

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