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Q: 

ruby-hmac rake:gems:install doesn't work

I added config.gem "ruby-hmac" in environment.rb

Then I run: rake gems:unpack

Then rake:gems:install

But when I ruby script:server I always got this error message:

Missing these required gems: ruby-hmac 

You're running:
  ruby 1.8.7.249 at /Users/macbookpro/.rvm/rubies/ruby-1.8.7-p249/bin/ruby
  rubygems 1.3.6 at /Users/macbookpro/.rvm/gems/ruby-1.8.7-p249, /Users/macbookpro/.rvm/gems/ruby-1.8.7-p249%global

Run `rake gems:install` to install the missing gems.

This is really frustrating, I got similar problem with some other gems, can anybody help, please?

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