--- a/config/config_init.rb	Sat Jul 02 17:04:25 2016 +0900
+++ b/config/config_init.rb	Sat Jul 02 17:18:07 2016 +0900
@@ -2,7 +2,8 @@
 $cfg[:secret_key] = ENV["ZP_SECRET_KEY"]
 $cfg[:newrelic] = ENV["ZP_NEWRELIC"] == 1
 
-config_local = File.expand_path("config_local_#{Rails.env}.rb", __dir__)
+env = ENV["RAILS_ENV"] || ENV["RACK_ENV"] || "development"
+config_local = File.expand_path("config_local_#{env}.rb", __dir__)
 
 require config_local if File.exist? config_local
 
@@ -10,7 +11,7 @@
 $cfg[:newrelic] = false if $cfg[:newrelic].nil?
 $cfg[:log_to_stdout] = true if $cfg[:log_to_stdout].nil?
 
-$cfg[:bundler_groups] ||= [:default, Rails.env]
+$cfg[:bundler_groups] ||= [:default, env]
 $cfg[:bundler_groups] << "standalone" if $cfg[:standalone]
 $cfg[:bundler_groups] << "newrelic" if $cfg[:newrelic]