You can configure the lookup path for the lua library in kamailio.lua
------ local cur_dir = debug.getinfo(1).source cur_dir = string.gsub(debug.getinfo(1).source, "^@(.+/)kamailio.lua$", "%1") package.path = package.path .. ";" .. cur_dir .. "?.lua" package.path = package.path .. ";" .. cur_dir .. "routing/?.lua" local utils = require 'logger' ---------