diff --git a/apps/emqx_conf/src/emqx_conf.erl b/apps/emqx_conf/src/emqx_conf.erl
index 00648db31..3da9f0457 100644
--- a/apps/emqx_conf/src/emqx_conf.erl
+++ b/apps/emqx_conf/src/emqx_conf.erl
@@ -146,8 +146,7 @@ dump_schema(Dir, SchemaModule, I18nFile) ->
         fun(Lang) ->
             gen_config_md(Dir, I18nFile, SchemaModule, Lang),
             gen_api_schema_json(Dir, I18nFile, Lang),
-            ExampleDir = filename:join(filename:dirname(filename:dirname(I18nFile)), "etc"),
-            gen_example_conf(ExampleDir, I18nFile, SchemaModule, Lang)
+            gen_example_conf(Dir, I18nFile, SchemaModule, Lang)
         end,
         [en, zh]
     ),
diff --git a/build b/build
index de00aba6c..d473f84df 100755
--- a/build
+++ b/build
@@ -112,9 +112,10 @@ make_docs() {
             SCHEMA_MODULE='emqx_conf_schema'
             ;;
     esac
+    mkdir -p _build/docgen
     # shellcheck disable=SC2086
     erl -noshell -pa $libs_dir1 $libs_dir2 $libs_dir3 -eval \
-        "Dir = filename:join([apps, emqx_dashboard, priv, www, static]), \
+        "Dir = filename:join(['_build', docgen]), \
          I18nFile = filename:join([apps, emqx_dashboard, priv, 'i18n.conf']), \
          ok = emqx_conf:dump_schema(Dir, $SCHEMA_MODULE, I18nFile), \
          halt(0)."
diff --git a/rebar.config.erl b/rebar.config.erl
index 9d9b0f874..c64f3dda2 100644
--- a/rebar.config.erl
+++ b/rebar.config.erl
@@ -462,7 +462,7 @@ etc_overlay(ReleaseType, Edition) ->
     [
         {mkdir, "etc/"},
         {copy, "{{base_dir}}/lib/emqx/etc/certs", "etc/"},
-        {copy, "apps/emqx_dashboard/etc/emqx.conf.en.example", "etc/emqx-example.conf"}
+        {copy, "_build/docgen/emqx.conf.en.example", "etc/emqx.conf.example"}
     ] ++
         lists:map(
             fun