En essayant d'installer dev kit pour ruby dans windows 7, mais ne parvient pas

Je suis en train d'installer le dev kit pour ruby pour le CommandT plugin vim et je suis frappé avec

C:\Users\Administrator>gem install rdiscount --platform=ruby
ERROR:  Error installing rdiscount:
        The 'rdiscount' native gem requires installed build tools.

Please update your PATH to include build tools or download the DevKit
from 'http://rubyinstaller.org/downloads' and follow the instructions
at 'http://github.com/oneclick/rubyinstaller/wiki/Development-Kit'

J'ai déjà installer devkit au illustré ci-dessous

C:\devkit>ruby dk.rb init
[INFO] found RubyInstaller v1.9.3 at C:/Ruby193

Initialization complete! Please review and modify the auto-generated
'config.yml' file to ensure it contains the root directories to all
of the installed Rubies you want enhanced by the DevKit.

C:\devkit>ruby dk.rb review
Based upon the settings in the 'config.yml' file generated
from running 'ruby dk.rb init' and any of your customizations,
DevKit functionality will be injected into the following Rubies
when you run 'ruby dk.rb install'.

C:/Ruby193

C:\devkit>ruby dk.rb install
[INFO] RubyGems override already in place for C:/Ruby193, skipping.
[WARN] DevKit helper library already exists for C:/Ruby193, skipping.

Ce qui pourrait être éventuellement va mal?

Edit: j'ai essayé

c:\devkit>ruby dk.rb install --force

Configures an MSYS/MinGW based Development Kit (DevKit) for
each of the Ruby installations on your Windows system. The
DevKit enables you to build many of the available native
C-based RubyGems that don't yet have a binary gem.

Usage: ruby dk.rb COMMAND

where COMMAND is one of:

  init     prepare DevKit for installation
  review   review DevKit install plan
  install  install required DevKit executables

désinstallé et installé de nouveau avec un répertoire propre. Mais l'erreur reste la même.

OriginalL'auteur Quintin Par | 2012-06-02