diff --git a/meta.jq b/meta.jq
index 12b7a6e..8f7f8e0 100644
--- a/meta.jq
+++ b/meta.jq
@@ -209,11 +209,14 @@ def build_command:
 			# munge the index to what crane wants ("Error: layout contains 5 entries, consider --index")
 			@sh "jq \("
 				.manifests |= (
-					del(.[].annotations)
-					| unique
+					"docker.io/\(first(.source.arches[.build.arch].archTags[0]))" as $refName
+					| unique_by([ .digest, .size, .mediaType ])
 					| if length != 1 then
-						error(\"unexpected number of manifests: \" + length)
+						error("unexpected number of manifests: " + length)
 					else . end
+					| .[0].annotations += {
+						"org.opencontainers.image.ref.name": $refName
+					}
 				)
 			" | unindent_and_decomment_jq(3)) temp/index.json > temp/index.json.new",
 			"mv temp/index.json.new temp/index.json",