diff --git a/mix.exs b/mix.exs
index 1e75eb0d4..2478a28c1 100644
--- a/mix.exs
+++ b/mix.exs
@@ -533,7 +533,6 @@ defmodule EMQXUmbrella.MixProject do
     [
       platform_data_dir: "data",
       platform_etc_dir: "etc",
-      platform_lib_dir: "lib",
       platform_log_dir: "log",
       platform_plugins_dir: "plugins",
       runner_bin_dir: "$RUNNER_ROOT_DIR/bin",
@@ -557,7 +556,6 @@ defmodule EMQXUmbrella.MixProject do
     [
       platform_data_dir: "/var/lib/emqx",
       platform_etc_dir: "/etc/emqx",
-      platform_lib_dir: "",
       platform_log_dir: "/var/log/emqx",
       platform_plugins_dir: "/var/lib/emqx/plugins",
       runner_bin_dir: "/usr/bin",
diff --git a/rebar.config.erl b/rebar.config.erl
index 5e1ec63bb..1cc18b434 100644
--- a/rebar.config.erl
+++ b/rebar.config.erl
@@ -269,7 +269,6 @@ overlay_vars_edition(ee) ->
 overlay_vars_pkg(bin) ->
     [ {platform_data_dir, "data"}
     , {platform_etc_dir, "etc"}
-    , {platform_lib_dir, "lib"}
     , {platform_log_dir, "log"}
     , {platform_plugins_dir, "plugins"}
     , {runner_bin_dir, "$RUNNER_ROOT_DIR/bin"}
@@ -282,7 +281,6 @@ overlay_vars_pkg(bin) ->
 overlay_vars_pkg(pkg) ->
     [ {platform_data_dir, "/var/lib/emqx"}
     , {platform_etc_dir, "/etc/emqx"}
-    , {platform_lib_dir, ""}
     , {platform_log_dir, "/var/log/emqx"}
     , {platform_plugins_dir, "/var/lib/emqx/plugins"}
     , {runner_bin_dir, "/usr/bin"}