diff --git a/releng.control/cleanupArtifacts.sh b/releng.control/cleanupArtifacts.sh
index 327090693377bd314fe25c0e6ebc1c7c91d94925..bfe521bbf485aa5b54ade8ee5059d16133d38119 100644
--- a/releng.control/cleanupArtifacts.sh
+++ b/releng.control/cleanupArtifacts.sh
@@ -16,6 +16,9 @@ fi
 
 # set at 10 days, under assumption that before that time, 
 # artifacts will be "saved" elsewhere, if needed.
+# if more cleanup is needed, we should take time, and 
+# existence of more recent builds into account, so we never
+# delete the last existing build (even if "old"). 
 n=10;
 
 echo "    Removing artifact directories older than $n days";