diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 474a258..2858d47 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -11,10 +11,6 @@ build:
 python:
   install:
     - requirements: docs/requirements.txt
-    - method: pip
-      path: .
-      extra_requirements:
-        - .
 
 sphinx:
   configuration: docs/conf.py
diff --git a/docs/requirements.txt b/docs/requirements.txt
index b957741..8735085 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,10 @@
+# This primarily exists for the readthedocs.io build, but may
+# also be useful for building docs in a local virtualenv:
+#
+#   python -m venv .venv
+#   source .venv/bin/activate
+#   pip install -r docs/requirements.txt
+#   make docs
+.
 setuptools_scm
 sphinx-rtd-theme