Die Installation Von RMagick Gem Rails 3

Fetching gem metadata from https://rubygems.org/...........
Fetching gem metadata from https://rubygems.org/..
Could not find gem 'rmagick v 2.13.1 (>= 0) x86-mingw32' in the gems available o
n this machine.

Hallo, erhalte ich die Meldung, wenn ich in bundle installieren unten ist mein gemsfile

source 'https://rubygems.org'

gem 'rails', '3.2.6'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'sqlite3'

gem 'carrierwave'
gem 'rmagick v 2.13.1'
# Gems used only for assets and not required
# in production environments by default.
group :assets do
 gem 'sass-rails',    '~> 3.2.3'
gem 'coffee-rails',  '~> 3.2.1'

# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platforms => :ruby

gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

# To use ActiveModel has_secure_password
 gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
 # gem 'jbuilder'

# Use unicorn as the app server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

 # To use debugger
# gem 'debugger'

gem 'will_paginate','~> 3.0'

Gibt es eine andere Möglichkeit Sie zu installieren, die die RMagick-gem in Rails 3? Ich installierte carrierwave und verwenden müssen, rmagick mit ihm. Kann ich mit carrierwave ohne rmagick?