我已经克隆了一个项目的 git 存储库，它正在使用 spree，我想在 localhost 上运行它。
但正如我在一篇文章中所说，我无法安装 spree gem：
$ rake gems:install
Missing the Spree 0.10.2 gem. Please `gem install -v=0.10.2 spree`, update your SPREE_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out SPREE_GEM_VERSION to use the latest version installed.
$ gem install -v=0.10.2 spree
Successfully installed spree-0.10.2
1 gem installed
Installing ri documentation for spree-0.10.2...
Installing RDoc documentation for spree-0.10.2...
$ script/server
Missing the Spree 0.10.2 gem. Please `gem install -v=0.10.2 spree`, update your SPREE_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out SPREE_GEM_VERSION to use the latest version installed.
$ gem list
*** LOCAL GEMS ***
actionmailer (2.3.5)
actionpack (2.3.5)
activemerchant (1.5.1)
activemodel (3.2.8)
activerecord (3.2.8, 2.3.5)
activerecord-tableless (0.1.0)
activeresource (2.3.5)
activesupport (3.2.8, 2.3.5)
arel (3.0.2)
authlogic (3.1.3)
authlogic-oid (1.0.4)
builder (3.0.3)
bundler (1.2.1)
chronic (0.2.3)
faker (0.3.1)
highline (1.5.1)
hoe (3.1.0)
i18n (0.6.1)
less (1.2.20)
multi_json (1.3.6)
mutter (0.5.3)
paperclip (2.3.1.1)
polyglot (0.3.3)
rack (1.1.0, 1.0.1)
rails (2.3.5)
rake (0.9.2.2)
rubygems-bundler (1.1.0)
rvm (1.11.3.5)
searchlogic (2.3.5)
spree (0.10.2)
state_machine (0.8.0)
stringex (1.0.3)
treetop (1.4.10)
tzinfo (0.3.33)
whenever (0.3.7)
will_paginate (2.3.11)
我试图用谷歌搜索这个问题，发现这样的分支：
https://groups.google.com/forum/?fromgroups=#!topic/spree-user/Fhn_PgFQ6i8
但是该解决方案对我不起作用。
这是我的系统：
Ubuntu 12.04
ruby 1.8.7 (2012-06-29 补丁级别 370) [x86_64-linux]