diff --git a/python-stdlib/collections.defaultdict/collections/defaultdict.py b/python-stdlib/collections-defaultdict/collections/defaultdict.py
similarity index 100%
rename from python-stdlib/collections.defaultdict/collections/defaultdict.py
rename to python-stdlib/collections-defaultdict/collections/defaultdict.py
diff --git a/python-stdlib/collections.defaultdict/manifest.py b/python-stdlib/collections-defaultdict/manifest.py
similarity index 79%
rename from python-stdlib/collections.defaultdict/manifest.py
rename to python-stdlib/collections-defaultdict/manifest.py
index bbce4be1..f8d566ab 100644
--- a/python-stdlib/collections.defaultdict/manifest.py
+++ b/python-stdlib/collections-defaultdict/manifest.py
@@ -2,4 +2,5 @@ metadata(version="0.3")
 
 # Originally written by Paul Sokolovsky.
 
+require("collections")
 package("collections")
diff --git a/python-stdlib/collections.defaultdict/test_defaultdict.py b/python-stdlib/collections-defaultdict/test_defaultdict.py
similarity index 100%
rename from python-stdlib/collections.defaultdict/test_defaultdict.py
rename to python-stdlib/collections-defaultdict/test_defaultdict.py
diff --git a/python-stdlib/collections.deque/collections/deque.py b/python-stdlib/collections-deque/collections/deque.py
similarity index 100%
rename from python-stdlib/collections.deque/collections/deque.py
rename to python-stdlib/collections-deque/collections/deque.py
diff --git a/python-stdlib/collections.deque/manifest.py b/python-stdlib/collections-deque/manifest.py
similarity index 68%
rename from python-stdlib/collections.deque/manifest.py
rename to python-stdlib/collections-deque/manifest.py
index e4306fae..0133d2ba 100644
--- a/python-stdlib/collections.deque/manifest.py
+++ b/python-stdlib/collections-deque/manifest.py
@@ -1,3 +1,4 @@
 metadata(version="0.1.3")
 
+require("collections")
 package("collections")
diff --git a/python-stdlib/collections/collections/__init__.py b/python-stdlib/collections/collections/__init__.py
index 471b3a52..7f3be567 100644
--- a/python-stdlib/collections/collections/__init__.py
+++ b/python-stdlib/collections/collections/__init__.py
@@ -1,9 +1,7 @@
-# Should be reimplemented for MicroPython
-# Reason:
-# CPython implementation brings in metaclasses and other bloat.
-# This is going to be just import-all for other modules in a namespace package
+# Replace built-in collections module.
 from ucollections import *
 
+# Provide optional dependencies (which may be installed separately).
 try:
     from .defaultdict import defaultdict
 except ImportError: