From google/oss-fuzz#7186 (comment)
I think CFLite should pass UPLOAD_BUILD to build_fuzzers to make it possible to exclude those large corpora from artifacts. Without that environment variable I can't skip that step with something like
if [[ "$MERGE_WITH_OSS_FUZZ_CORPORA" == "yes" ]]; then
# When the latest builds are uploaded by CFLite the large OSS-Fuzz corpora
# should be excluded regardless of whether MERGE_WITH_OSS_FUZZ_CORPORA
# is set to "yes" or not.
[[ "$UPLOAD_BUILD" == "true" ]] && exit 0
....