-package "ruby#{node[:passenger][:ruby_version]}"
-package "rubygems#{node[:passenger][:ruby_version]}"
-gem_package "json"
-gem_package "sqlite3"
-gem_package "sinatra"
-gem_package "sinatra-r18n"
-gem_package "rack-contrib"
+ruby_version = node[:passenger][:ruby_version]
+
+package "ruby#{ruby_version}"
+
+%w(json sqlite3 sinatra sinatra-r18n rack-contrib).each do |gem|
+ gem_package gem do
+ gem_binary "gem#{ruby_version}"
+ end
+end