如何解决安装自定义构建的gem时出现的权限错误?

我正试图建立我的第一个红宝石宝石,似乎一切顺利,直到我试图安装宝石。我使用的是RVM,所以这里不需要安装“sudo gem”。

首先,我尝试执行以下操作:

jim:~/Desktop/spectest \ [git:master]  
→ rake manifest
(in /Users/jim/Desktop/spectest)
Cleaning
- pkg
rm -rf pkg
Building Manifest
  Manifest
  README
  Rakefile
  bin/buildcss
  ...

jim:~/Desktop/spectest \ [git:master]  
→ rake install
(in /Users/jim/Desktop/spectest)
Cleaning
Gemspec generated
mkdir -p pkg
mkdir -p pkg/css-reader-0.1.0
rm -f pkg/css-reader-0.1.0/Manifest
...
cd pkg
tar zcvf css-reader-0.1.0.tar.gz css-reader-0.1.0
a css-reader-0.1.0
a css-reader-0.1.0/bin
...
cd -
WARNING:  description and summary are identical
  Successfully built RubyGem
  Name: css-reader
  Version: 0.1.0
  File: css-reader-0.1.0.gem
mv css-reader-0.1.0.gem pkg/css-reader-0.1.0.gem
Private key not found; gem will not be signed.
Targeting "ruby" platform.
Password:
Sorry, try again.
Password:
ERROR:  While executing gem ... (Gem::InstallError)
    cannot uninstall, check `gem list -d css-reader`
Successfully installed css-reader-0.1.0
1 gem installed
Installing ri documentation for css-reader-0.1.0...
Updating class cache with 3288 classes...
Installing RDoc documentation for css-reader-0.1.0...

好吧-所以我不确定为什么在这里得到gem::installError。是否有Ruby Gems保存的日志,我可以找到关于错误的更多详细信息?不管怎样,我尝试直接安装.gem包:

gem install pkg/css-reader-0.1.0.gem
ERROR:  While executing gem ... (Errno::EACCES)
    Permission denied - /Users/jim/.rvm/gems/ruby-1.9.2-preview1/gems/css-reader-0.1.0/Manifest

我得到了更多的反馈。这一次,清单文件出现权限错误。因此,我尝试chmod 777清单文件,并再次重复这个过程,但我一直得到错误。在我看来,这是个新手的错误。感谢您的任何建议!