diff --git a/README.md b/README.md
index c7c5d3d..f287158 100644
--- a/README.md
+++ b/README.md
@@ -71,3 +71,11 @@ git clone https://github.com/jupyter/jupyter-packaging.git
 cd jupyter-packaging
 pip install -e .
 ```
+
+You can test changes locally by creating a `pyproject.toml` with the following, replacing the local path to the git checkout:
+
+```
+[build-system]
+requires = ["jupyter_packaging@file://<path-to-git-checkout>", "setuptools>=40.8.0", "wheel"]
+build-backend = "setuptools.build_meta"
+```
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