diff --git a/examples/config b/examples/config
index 393e83f7..9533af81 100644
--- a/examples/config
+++ b/examples/config
@@ -12,5 +12,6 @@ luaservice = root.."service/?.lua;"..root.."test/?.lua;"..root.."examples/?.lua"
 lualoader = "lualib/loader.lua"
 -- preload = "./examples/preload.lua"	-- run preload.lua before every lua service run
 snax = root.."examples/?.lua;"..root.."test/?.lua"
+-- snax_interface_g = "snax_g"
 cpath = root.."cservice/?.so"
 -- daemon = "./skynet.pid"
diff --git a/lualib/snax.lua b/lualib/snax.lua
index 6a01460f..524f1c07 100644
--- a/lualib/snax.lua
+++ b/lualib/snax.lua
@@ -4,7 +4,9 @@ local snax_interface = require "snax.interface"
 local snax = {}
 local typeclass = {}
 
-local G = { require = function() end }
+local interface_g = skynet.getenv("snax_interface_g")
+local G = interface_g and require (interface_g) or { require = function() end }
+interface_g = nil
 
 skynet.register_protocol {
 	name = "snax",