# File lib/rubygems.rb, line 1207
  def gem(gem_name, *requirements) # :doc:
    skip_list = (ENV['GEM_SKIP'] || "").split(/:/)
    raise Gem::LoadError, "skipping #{gem_name}" if skip_list.include? gem_name
    spec = Gem::Dependency.new(gem_name, *requirements).to_spec
    spec.activate if spec
  end