Hi,

<snip>

> eventmachine:
>
> updating eventmachine...
> ERROR:  > ERROR: Failed to build gem native extension.
>
> c:/ruby/bin/ruby.exe extconf.rb update eventmachine
> checking for windows.h... no
>
> nmake
> 'nmake' is not recognized as an internal or external command,
> operable program or batch file.

Looks like eventmachine is a C extension. You either don't have a
compiler installed, or your shell's environment isn't setup right.
Therefore, it fails.

Or did I miss the point of your question somehow?

Regards,

Dan