FastDebugger install problem

Hi

Has some managed to install Ruby Debugger with gems package manager ?

I was trying to install the debugger with command “gem install ruby-
debug”

=====================================================================
C:\ruby>gem install ruby-debug
Building native extensions. This could take a while…
ERROR: While executing gem … (RuntimeError)
Error instaling ruby-debug:
ERROR: Failed to build gem native extension.

ruby extconf.rb install ruby-debug
creating Makefile

nmake
‘nmake’ is not recognized as an internal or external command,
operable program or batch file.

Gem files will remain installed in c:/ruby/lib/ruby/gems/1.8/gems/ruby-
debug-bas
e-0.10.0 for inspection.
Results logged to c:/ruby/lib/ruby/gems/1.8/gems/ruby-debug-
base-0.10.0/ext/gem_
make.out

=====================================================================

Is there a way to fix this ?
Please help.

Vasanth