Wipe package cache when base is patched

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/sbo-batch-test b/sbo-batch-test
index ac3297c..75b8305 100755
--- a/sbo-batch-test
+++ b/sbo-batch-test
@@ -303,6 +303,11 @@ update_base() {
     fi
   done
   echo "$head_now" > "$marker"
+  # Base changed: cached deps were built against the old base, drop them all.
+  if [[ -n "$PKG_CACHE" && -d "$PKG_CACHE" ]]; then
+    rm -rf "${PKG_CACHE:?}"/*
+    echo "Package cache cleared (base changed)."
+  fi
   echo "Base patched."
 }