YNH_DEBIAN didn't work...

manifest.toml

@@ -159,6 +159,7 @@ ram.runtime = "100M"
     packages = "python3-pip python3-full curl apt-transport-https gnupg"
     # repo for couchdb
     extras.couchdb.repo = "deb https://apache.jfrog.io/artifactory/couchdb-deb/ __YNH_DEBIAN__ main"
+    extras.couchdb.repo = "deb https://apache.jfrog.io/artifactory/couchdb-deb/ bullseye main"
     extras.couchdb.key = "https://couchdb.apache.org/repo/keys.asc"
     extras.couchdb.packages = ["couchdb"]
     extras.couchdb.name = "couchdb"