diff --git a/Makefile b/Makefile
index 78b44c5e4b..41f02745a8 100644
--- a/Makefile
+++ b/Makefile
@@ -701,8 +701,12 @@ legal-info: dirs legal-info-clean legal-info-prepare $(foreach p,$(PACKAGES),$(p
 		cat support/legal-info/README.warnings-header \
 			$(LEGAL_WARNINGS) >>$(LEGAL_REPORT); \
 		cat $(LEGAL_WARNINGS); fi
-	@echo "Legal info produced in $(LEGAL_INFO_DIR)"
 	@rm -f $(LEGAL_WARNINGS)
+	@(cd $(LEGAL_INFO_DIR); \
+		find * -type f -exec sha256sum {} + | LC_ALL=C sort -k2 \
+			>.legal-info.sha256; \
+		mv .legal-info.sha256 legal-info.sha256)
+	@echo "Legal info produced in $(LEGAL_INFO_DIR)"
 
 show-targets:
 	@echo $(PACKAGES) $(TARGETS_ROOTFS)