diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 09a1a50..eab3c9e 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -25,6 +25,7 @@
 #   /pio/ci/ccache                  the host tests' objects (they're built for coverage, which the build
 #                                   cache can't keep: it would lose the .gcno files)
 #   /pio/ci/venv                    PlatformIO and gcovr: delete the folder to upgrade them
+# To start from nothing (a slow run, about 7 minutes): delete /pio/ci and that .roro-sdkconfig.defaults file.
 name: CI
 on:
   push: