PS C:\Users\Roman> ruby dk.rb install
[INFO] Updating convenience notice gem override for 'C:/Program Files (x86)/Heroku/ruby-1.9.3'
dk.rb:86:in `rename': Permission denied @ sys_fail2 - (C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/site_ruby/1.9.1
/rubygems/defaults/operating_system.rb, C:/Program Files (x86)/Heroku/ruby-1.9.3/lib/ruby/site_ruby/1.9.1/rubygems/defau
lts/operating_system.rb.20141106064922) (Errno::EACCES)
from dk.rb:86:in `update_gem_override'
from dk.rb:260:in `block (2 levels) in install'
from dk.rb:246:in `each'
from dk.rb:246:in `block in install'
from dk.rb:219:in `each'
from dk.rb:219:in `install'
from dk.rb:313:in `run'
from dk.rb:332:in `<main>'
尝试安装 devkit。“ruby dk.rb init”顺利进行。然后发生这种情况。有任何想法吗?