diff --git a/dev_tools/README.md b/dev_tools/README.md
index 1e24a69450..514c7cc0ed 100644
--- a/dev_tools/README.md
+++ b/dev_tools/README.md
@@ -44,7 +44,7 @@ sphinx-build -b html -W build/manual/source/ build/manual/build/html
 Create the [custom domain](https://docs.github.com/en/pages/configuring-a-custom-domain-for-your-github-pages-site) file for the HTML manual
 
 ```bash
-echo manual.nexusformat.org > $(BUILD_DIR)/manual/build/html/CNAME
+echo manual.nexusformat.org > build/manual/build/html/CNAME
 ```
 
 Auto-formatting and syntax checking to the developer tools themselves