diff --git a/iso/builder/build.sh b/iso/builder/build.sh
index e1fa137..98471b2 100755
--- a/iso/builder/build.sh
+++ b/iso/builder/build.sh
@@ -1411,8 +1411,11 @@ dump_memtest_debug "pre-build" "${LB_DIR}"
 run_step_sh "live-build build" "90-lb-build" "lb build 2>&1"
 echo "=== enforcing canonical bootloader assets ==="
 enforce_live_build_bootloader_assets "${LB_DIR}"
+reset_live_build_stage "${LB_DIR}" "binary_checksums"
+reset_live_build_stage "${LB_DIR}" "binary_iso"
+reset_live_build_stage "${LB_DIR}" "binary_zsync"
 run_step_sh "rebuild live-build checksums after bootloader sync" "91b-lb-checksums" "lb binary_checksums 2>&1"
-run_step_sh "rebuild ISO after bootloader sync" "91c-lb-binary-iso" "rm -f '${LB_DIR}/live-image-amd64.hybrid.iso' && lb binary_iso 2>&1"
+run_step_sh "rebuild ISO after bootloader sync" "91c-lb-binary-iso" "lb binary_iso 2>&1"
 run_step_sh "rebuild zsync after bootloader sync" "91d-lb-zsync" "lb binary_zsync 2>&1"
 
 # --- persist deb package cache back to shared location ---