define (Rake::GemPackageTask)

        # File lib/rake/gempackagetask.rb, line 77
    77:     def define
    78:       super
    79:       task :package => [:gem]
    80:       task :gem => ["#{package_dir}/#{gem_file}"]
    81:       file "#{package_dir}/#{gem_file}" => [package_dir] + @gem_spec.files do
    82:         when_writing("Creating GEM") {
    83:           Gem::Builder.new(gem_spec).build
    84:           verbose(true) {
    85:             mv gem_file, "#{package_dir}/#{gem_file}"
    86:           }
    87:         }
    88:       end
    89:     end