diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644
index 0000000..7ac1f46
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,15 @@
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+# Project page: https://readthedocs.org/projects/python-docs-theme-previews/
+
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3"
+
+  commands:
+    - git clone --depth=1 https://github.com/python/cpython
+    - make html CPYTHON_PATH=cpython
+    - mv cpython/Doc/build _readthedocs
diff --git a/Makefile b/Makefile
index 7cde7e9..bae8932 100644
--- a/Makefile
+++ b/Makefile
@@ -1,22 +1,29 @@
-CPYTHON_PATH               = ../cpython
+# You can set these variables from the command line.
+CPYTHON_PATH = ../cpython
+PYTHON       = python3
 PACKAGE_ABS_PATH = $(shell pwd)/$(shell find dist/python-docs-theme-*.tar.gz)
 
 
-.PHONY: html
-html: venv
-	cd $(CPYTHON_PATH)/Doc && \
-		make html
-
+.PHONY: help
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  venv       to create a venv with necessary tools at $(CPYTHON_PATH)/Doc/venv"
+	@echo "  html       to make standalone CPython HTML files"
+	@echo "  htmlview   to open the index page built by the html target in your browser"
 
 .PHONY: venv
 venv:
-	python3 -m build
+	$(PYTHON) -m pip install build
+	$(PYTHON) -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"
+.PHONY: html
+html: venv
+	cd $(CPYTHON_PATH)/Doc && \
+		make html
+
+.PHONY: htmlview
+htmlview: html
+	$(PYTHON) -c "import os, webbrowser; webbrowser.open('file://' + os.path.realpath('$(CPYTHON_PATH)/Doc/build/html/index.html'))"