Bundler無法找到適用於Rails 4.0.0的gem「railties」的兼容版本

我想升級到Rails 4.0.0，並且我更改了sass-rails和coffee-rails的gem版本。我需要解決rails和coffee-rails之間的衝突寶石之前，我可以升級到Rails 4Bundler無法找到適用於Rails 4.0.0的gem「railties」的兼容版本

當我跑bundle update這是我得到的輸出：

$ bundle update 
Updating git://github.com/pilu/web-app-theme.git 
Fetching source index from https://rubygems.org/ 
Resolving dependencies.............. 
Bundler could not find compatible versions for gem "railties": 
    In Gemfile: 
    rails (= 4.0.0) ruby depends on 
     railties (= 4.0.0) ruby 

    coffee-rails (= 4.0.0) ruby depends on 
     railties (4.0.0.rc2)

我Gemfile：

source 'https://rubygems.org' 

gem 'rails', '4.0.0' 

gem 'cancan' 
gem 'client_side_validations' 
gem 'devise', '~> 1.5.3' 
gem 'dynamic_form' 
gem 'execjs' 
gem 'haml' 
gem 'httparty' 
gem 'jquery-rails' 
gem 'mysql2' 
gem 'paperclip', '~> 2.4' 
gem 'prawn' 
gem 'rails3-jquery-autocomplete' 
gem 'rake', '0.9.2' 
gem 'remotipart', '~> 1.0' 
gem 'simple_datatables' 
gem 'therubyracer' 
gem 'validates_timeliness', '~> 3.0.2' 
gem 'will_paginate', '~> 3.0' 

gem 'turbolinks' 
gem 'jquery-turbolinks' 

gem 'noty-rails' 

gem 'font-awesome-rails' 

gem 'socket.io-rails' 

gem 'attr_encrypted' 

gem 'bullet', :group => 'development' 

#temp for demo.managetherapy.com 
#gem 'faker' 

group :test do 
    gem 'capybara' 
    gem 'cucumber-rails', :require => false 
    gem 'database_cleaner' 
    gem 'factory_girl_rails' 
# gem 'faker' 
    gem 'guard-rspec' 
    gem 'selenium-webdriver', '2.7.0' 
    gem 'webrat' 
end 

group :development, :test do 
    gem 'faker' 
    gem 'haml-rails' 
    gem 'hpricot' 
    gem 'rspec-rails' 
    gem 'ruby_parser' 
    #gem 'web-app-theme', '~> 0.8.0' 
    gem 'web-app-theme', :git =>'git://github.com/pilu/web-app-theme.git' 
end 

gem 'sass-rails', '4.0.0' 
gem 'compass-rails', '1.0.3' 
gem 'coffee-rails', '4.0.0' 
gem 'uglifier', '>= 2.1.1' 
gem 'bootstrap-sass-rails' 

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

# Deploy with Capistrano 
gem 'capistrano' 
gem 'rvm-capistrano' 

gem 'passenger'

來源

2013-06-26 Brian Petersen