diff --git a/Makefile b/Makefile
index 5609e3d..7f046c0 100644
--- a/Makefile
+++ b/Makefile
@@ -17,12 +17,22 @@ include src/macros.mk
 include src/packages.mk
 include src/packages_manual.mk
 
-compat:
-	./src/compat.sh
-
 DEFAULT_GOAL := default
 .PHONY: default
 default: compat bootstrap core
 
+.PHONY: compat
+compat:
+	./src/compat.sh
+
+.PHONY: digests
+digests:
+	@for each in $$(find out -iname "index.json"| sort); do \
+		printf \
+			"%-20s | %-50s\n"  \
+			"$$(basename $$(dirname $$each))"  \
+			$$(cat $$each | jq -r '.manifests[].digest'); \
+	done
+
 out/graph.svg: Makefile
 	$(MAKE) -Bnd | make2graph | dot -Tsvg -o graph.svg