我试图安装Rails 4.2.0.beta1(2014年8月20日发布).我收到错误Bundler找不到gem"sprockets-rails"的兼容版本.以下是详细信息:
$ bundle update rails
Fetching gem metadata from https://rubygems.org/.........
Fetching additional metadata from https://rubygems.org/..
Resolving dependencies...
Bundler could not find compatible versions for gem "sprockets-rails":
In Gemfile:
sass-rails (~> 4.0.3) ruby depends on
sprockets-rails (~> 2.0) ruby
rails (= 4.2.0.beta1) ruby depends on
sprockets-rails (3.0.0.beta1)
如何安装Rails 4.2.0.beta1？