diff --git a/build-baseline.sh b/build-baseline.sh
index 064703cf..a4222696 100755
--- a/build-baseline.sh
+++ b/build-baseline.sh
@@ -27,9 +27,9 @@ git -C "$ROOT" submodule update --init \
 #    runtime data dirs (cache/tmp/logs/images are data, not verified code).
 log "core: Joomla 3.8.11 (official package)"
 rsync -a \
-  --exclude='cache/' --exclude='tmp/' --exclude='logs/' \
-  --exclude='images/sampledata/' --exclude='images/banners/' --exclude='images/headers/' \
-  --exclude='images/joomla_black.png' --exclude='images/powered_by.png' \
+  --exclude='/cache/' --exclude='/tmp/' --exclude='/logs/' \
+  --exclude='/images/sampledata/' --exclude='/images/banners/' --exclude='/images/headers/' \
+  --exclude='/images/joomla_black.png' --exclude='/images/powered_by.png' \
   "$ROOT/core/" "$OUT/"
 
 # 2) Upstream-package extensions — deployed-layout, byte-reconciled to live.