diff --git a/README.md b/README.md
index 4b9cc6765800a33ff22b59e29fad14f194e5da4d..0e849669b271b7795ba11646e5e5b0f027a1c34a 100644
--- a/README.md
+++ b/README.md
@@ -241,8 +241,11 @@ scripts/format-project.sh
 
 You can optionally put something like `CLANG_FORMAT=clang-format-7` before that command
 if your clang-format binary isn't named `clang-format`.
-Note that you'll typically prefer to use something like `git clang-format`
+**Note that you'll typically prefer** to use something like `git clang-format`
 to just re-format your changes, in case version differences in tools result in overall format changes.
+The CI "style" job currently runs on Debian Buster, so it has clang-format-7.
+We will probably update that job to Bullseye or Ubuntu 20.10, which will allow
+using clang-format-11 by default, soon.
 
 [OpenHMD]: http://openhmd.net
 [drm-lease]: https://haagch.frickel.club/#!drmlease%2Emd