diff --git a/docs/builders.rst b/docs/builders.rst
index df1cb7e..d497d11 100644
--- a/docs/builders.rst
+++ b/docs/builders.rst
@@ -20,6 +20,8 @@ You can use the following builders in your configuration file out of the box:
 
 .. autofunction:: compile_html_file
 
+.. autofunction:: delete_tiddlers
+
 .. autofunction:: editionify
 
 .. autofunction:: export_public_tiddlers
diff --git a/tzk/default_config.py b/tzk/default_config.py
index 016f3e6..394028c 100644
--- a/tzk/default_config.py
+++ b/tzk/default_config.py
@@ -80,7 +80,7 @@ products = {
         # Replace the names of people who don't have public tiddlers with their initials.
         builders.replace_private_people(),
         # Change the 'text' field of these tiddlers to new values.
-        builders.set_tiddler_values(mappings={
+        builders.set_tiddler_values(text={
             '$__config_sib_CurrentEditionPublicity.tid': 'public',
             '$__config_sib_IsPublicEdition.tid': 'false',
             '$__config_DefaultSidebarTab.tid': '$:/sib/SideBar/Explore',