diff --git a/lib/const.rb b/lib/const.rb
index 2ffcb2d8e..53b23f0b1 100644
--- a/lib/const.rb
+++ b/lib/const.rb
@@ -29,3 +29,5 @@ CREW_NOT_COMPRESS = ENV["CREW_NOT_COMPRESS"]
 CREW_NOT_STRIP = ENV["CREW_NOT_STRIP"]
 
 USER = `whoami`.chomp
+
+CHROMEOS_RELEASE = `grep CHROMEOS_RELEASE_CHROME_MILESTONE= /etc/lsb-release | cut -d'=' -f2`.chomp