--- a/util/prosodyctl/check.lua	Tue Jun 29 16:18:31 2021 +0200
+++ b/util/prosodyctl/check.lua	Sat Jul 03 03:24:26 2021 +0200
@@ -299,10 +299,12 @@
 	if not what or what == "dns" then
 		local dns = require "net.dns";
 		pcall(function ()
+			local unbound = require"net.unbound";
 			local unbound_config = configmanager.get("*", "unbound") or {};
 			unbound_config.hoststxt = false; -- don't look at /etc/hosts
 			configmanager.set("*", "unbound", unbound_config);
-			dns = require"net.unbound".dns;
+			unbound.purge(); -- ensure the above config is used
+			dns = unbound.dns;
 		end)
 		local idna = require "util.encodings".idna;
 		local ip = require "util.ip";