$(quicly_src_dir) > $(quicly_build_log)
@$(MAKE) $(MAKE_ARGS) -C $(quicly_build_dir) > $(quicly_build_log)
@mkdir -p $(picotls_build_dir)
@cd $(picotls_build_dir) && \
$(quicly_src_dir) > $(quicly_build_log)
@$(MAKE) $(MAKE_ARGS) -C $(quicly_build_dir) > $(quicly_build_log)
@mkdir -p $(picotls_build_dir)
@cd $(picotls_build_dir) && \