diff --git a/script/update-docs.rb b/script/update-docs.rb
index b441e78899..da1f45202d 100644
--- a/script/update-docs.rb
+++ b/script/update-docs.rb
@@ -81,12 +81,14 @@ def wrap_front_matter(front_matter)
 end
 
 def expand_l10n(path, content, get_f_content, categories, ext)
-  content.gsub!(/include::({build_dir}\/)?(\S+)\.#{ext}/) do |line|
-    line.gsub!("include::", "")
-    if categories[line]
-      new_content = categories[line]
+  content.gsub!(/include::({build_dir}\/)?(\S+)\.#{ext}/) do
+    match = Regexp.last_match
+    target = "#{match[2]}.#{ext}"
+    base = match[1] ? path.split("/", 2).first : File.dirname(path)
+    if categories[target]
+      new_content = categories[target]
     else
-      new_content, new_path = get_f_content.call(path, line)
+      new_content, new_path = get_f_content.call(base, target)
     end
     if new_content
       expand_l10n(new_path, new_content, get_f_content, categories, ext)
@@ -230,8 +232,8 @@ def index_l10n_doc(filter_tags, doc_list, get_content)
 
     puts "Found #{doc_files.size} entries"
 
-    get_content_f = proc do |source, target|
-      name = File.join(File.dirname(source), target)
+    get_content_f = proc do |base, target|
+      name = File.join(base, target)
       content_file = tag_files.detect { |ent| ent.first == name }
       if content_file
         new_content = get_content.call(content_file[1])