C:\Windows\System32>gem install ruby-debug-ide --pre
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing ruby-debug-ide:
        ERROR: Failed to build gem native extension.

    d:/dev/Ruby19/bin/ruby.exe extconf.rb
creating Makefile

make
generating ruby_debug-i386-mingw32.def
compiling ruby_debug.c
ruby_debug.c:3:18: fatal error: node.h: No such file or directory
compilation terminated.
make: *** [ruby_debug.o] Error 1


Gem files will remain installed in d:/dev/Ruby19/lib/ruby/gems/1.9.1/gems/ruby-debug-base-0.9.2 for inspection.
Results logged to d:/dev/Ruby19/lib/ruby/gems/1.9.1/gems/ruby-debug-base-0.9.2/ext/gem_make.out