diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 8f5edaa..b313093 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -13,3 +13,12 @@
 - bump version (YYYY.MM.dev) in setup.py and python_docs_theme/theme.conf
 - Commit this last bump.
 - push and push the tag (``git push && git push --tags``)
+
+# Makefile usage
+
+This project includes a simple Makefile for syncing changes to the theme with
+the main CPython repository. Run ``make help`` for details on available rules.
+
+There is one configurable variable, ``CPYTHON_PATH``, which should be the path
+to the CPython repository on your machine. By default, it points to
+``../cpython``.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..7cde7e9
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,22 @@
+CPYTHON_PATH               = ../cpython
+PACKAGE_ABS_PATH = $(shell pwd)/$(shell find dist/python-docs-theme-*.tar.gz)
+
+
+.PHONY: html
+html: venv
+	cd $(CPYTHON_PATH)/Doc && \
+		make html
+
+
+.PHONY: venv
+venv:
+	python3 -m build
+	cd $(CPYTHON_PATH)/Doc \
+		&& make venv \
+		&& ./venv/bin/pip install $(PACKAGE_ABS_PATH)
+
+.PHONY: help
+help:
+	@echo "html:		default rule; run the \`venv\` rule, and also rebuild the CPython docs"
+	@echo "venv: 		build the package, and install it into the virtual environment"
+	@echo "		at $(CPYTHON_PATH)/Doc/venv"