diff --git a/internal_filesystem/main.py b/internal_filesystem/main.py
index 992fcb2b..2f49fd3b 100644
--- a/internal_filesystem/main.py
+++ b/internal_filesystem/main.py
@@ -356,9 +356,9 @@ def start_app(app_dir, is_launcher=False):
 execute_script_new_thread("/autorun.py", True, False, False)
 
 try:
-    import freezefs_mount
+    import freezefs_mount_builtin
 except Exception as e:
-    print("/main.py: WARNING: could not import freezefs_mount: ", e)
+    print("/main.py: WARNING: could not import/run freezefs_mount_builtin: ", e)
 
 # The launcher might have been updated from the builtin one, so check that:
 import uos
diff --git a/scripts/build_freezefs_mount_builtin.sh b/scripts/build_freezefs_mount_builtin.sh
new file mode 100644
index 00000000..48c0ebe8
--- /dev/null
+++ b/scripts/build_freezefs_mount_builtin.sh
@@ -0,0 +1 @@
+python3 -m freezefs --target /builtin --on-import mount ~/sources/PiggyOS/internal_filesystem/builtin freezefs_mount_builtin.py