Deployment Gemfile.lock woes

Error

 You are trying to install in deployment mode after changing
 your Gemfile. Run `bundle install` elsewhere and add the
 updated Gemfile.lock to version control.
  
 You have deleted from the Gemfile:
 * guard-pow
 * rb-fsevent

Gemfile

#This shows the proper way
# - Now when you deploy, it will ignore the gems in the 
#   development group and when you want to install the 
#   app on a computer that isn't a mac you can run bunlder
#   as `bundle --without darwin` the first time, and then 
#   every following time you can just run `bundle`, as bundler
#   is supposed to remember the 'without' option for subsequent runs

source 'http://rubygems.org'

gem 'rails', '3.0.7'

gem 'mysql2', '~>0.2.7'
gem 'haml', ">= 3.0.17"
gem 'compass', ">= 0.10.4"
gem "devise", '>= 1.1.2'
gem 'declarative_authorization', ">= 0.5" 
gem 'formtastic', '~> 1.2.0'
gem "will_paginate", "~> 3.0.pre2"
gem "jquery-rails"
gem 'paperclip'
gem 'meta_where'
gem 'dynamic_default_scoping'

group :development, :test do
  gem 'mongrel', ">= 1.2.0.pre2"
  gem "rspec-rails", "~> 2.6.rc4"
  gem 'shoulda-matchers'
  gem "cucumber-rails"
  gem 'pickle'
  gem 'spork', '~> 0.9.0.rc'
  gem 'launchy'
  group :darwin do
    gem 'rb-fsevent', :require => false
    gem 'guard-pow', :require => false
  end
  gem 'growl'
  gem 'guard-rspec', :require => false
  gem 'guard-cucumber', :require => false
  gem 'guard-livereload', :require => false
  gem 'guard-spork', :require => false
  gem 'guard-bundler', :require => false
  gem "capybara-webkit"
  gem 'capybara'
  gem 'database_cleaner'
  gem 'factory_girl', '~> 1.3.3'
end

gem 'RedCloth', '>= 4.1.1'

Thanks for posting. This helped me with a real head-scratcher!

Thanks!