diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index d540969..18c3ad0 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -155,11 +155,14 @@ in
     extraOptions = "listen-on-v6 port 5354 { ::1; };";
     cacheNetworks = [ "::1/128" ];
     zones = {
-      "XN--WBTZ5WPQAJ35CFXC.XN--J6W193G" = {
-        name = "XN--WBTZ5WPQAJ35CFXC.XN--J6W193G";
+      "m-labs.hk" = {
+        name = "m-labs.hk";
         master = true;
-        file = "/etc/nixos/named/m-labs.zone";
+        file = "/etc/nixos/named/m-labs.hk";
         extraConfig = ''dnssec-policy "default";'';
+        slaves = [
+          "213.239.220.50" "2a01:4f8:a0:7041::1"  # qnetp
+        ];
       };
     };
   };
diff --git a/nixbld-etc-nixos/named/m-labs.hk b/nixbld-etc-nixos/named/m-labs.hk
new file mode 100644
index 0000000..ce47046
--- /dev/null
+++ b/nixbld-etc-nixos/named/m-labs.hk
@@ -0,0 +1,47 @@
+$TTL 7200
+
+@						SOA	42-200-147-171.static.imsbiz.com. sb.m-labs.hk. (
+							2022062801
+							7200
+							3600
+							86400
+							600)
+
+
+						NS		42-200-147-171.static.imsbiz.com.
+						NS		ns1.qnetp.net.
+
+						A		42.200.147.171
+						AAAA	2001:470:18:629::2
+						MX		10 ssl.serverraum.org.
+						TXT		"v=spf1 mx -all"
+						TXT		"google-site-verification=Tf_TEGZLG7-2BE70hMjLnzjDZ1qUeUZ6vxzbl1sagT8"
+
+
+mail					CNAME	@
+lab						CNAME	@
+www						CNAME	@
+nixbld					CNAME	@
+call					CNAME	@
+conda					CNAME	@
+git						CNAME	@
+chat					CNAME	@
+hooks					CNAME	@
+forum					CNAME	@
+perso					CNAME	@
+rt						CNAME	@
+
+rpi-1					AAAA	2001:470:f821:1:dea6:32ff:fe8a:6a93
+rpi-2					AAAA	2001:470:f821:1:ba27:ebff:fef0:e9e6
+rpi-3					AAAA	2001:470:f821:1:dea6:32ff:fe14:fd67
+rpi-4					AAAA	2001:470:f821:1:dea6:32ff:fe14:fce9
+rpi-ext					AAAA	2001:470:f821:1:dea6:32ff:fe95:2fcf
+juno					AAAA	2001:470:f821:1:2fcb:b47b:1b5f:eac4
+cnc						AAAA	2001:470:f821:1:021e:c9ff:fe75:b6d3
+zeus					AAAA	2001:470:f821:1:9a72:a418:5466:0b9a
+hera					AAAA	2001:470:f821:1:8406:1390:2110:5825
+chiron					AAAA	2001:470:f821:1:addc:01ca:febc:a468
+hestia					AAAA	2001:470:f821:1:ef18:fbec:2162:2c4c
+vulcan					AAAA	2001:470:f821:1:a9aa:5da6:d8ee:84db
+old-nixbld				AAAA	2001:470:f821:1:021f:bcff:fe12:9170
+franz					AAAA	2001:470:f821:1:39a9:9221:da3d:f6e2
diff --git a/nixbld-etc-nixos/named/m-labs.zone b/nixbld-etc-nixos/named/m-labs.zone
deleted file mode 100644
index e0fcf6a..0000000
--- a/nixbld-etc-nixos/named/m-labs.zone
+++ /dev/null
@@ -1,55 +0,0 @@
-$ORIGIN XN--WBTZ5WPQAJ35CFXC.XN--J6W193G.
-$TTL 86400
-XN--WBTZ5WPQAJ35CFXC.XN--J6W193G.	IN	SOA	42-200-147-171.static.imsbiz.com. sb.m-labs.hk. (
-			2022050801
-			10800
-			3600
-			604800
-			86400 )
-
-
-			NS	42-200-147-171.static.imsbiz.com.
-			NS	m-labs.science.
-
-			A		42.200.147.171
-			AAAA	2001:470:18:629::2
-
-$ORIGIN XN--WBTZ5WPQAJ35CFXC.XN--J6W193G.
-$TTL 10800
-lab			A	42.200.147.171
-lab                     AAAA    2001:470:18:629::2
-www                     A       42.200.147.171
-www                     AAAA    2001:470:18:629::2
-nixbld                  A       42.200.147.171
-nixbld                  AAAA    2001:470:18:629::2
-call                    A       42.200.147.171
-call                    AAAA    2001:470:18:629::2
-conda                   A       42.200.147.171
-conda                   AAAA    2001:470:18:629::2
-git                     A       42.200.147.171
-git                     AAAA    2001:470:18:629::2
-chat                    A       42.200.147.171
-chat                    AAAA    2001:470:18:629::2
-hooks                   A       42.200.147.171
-hooks                   AAAA    2001:470:18:629::2
-forum                   A       42.200.147.171
-forum                   AAAA    2001:470:18:629::2
-perso                   A       42.200.147.171
-perso                   AAAA    2001:470:18:629::2
-rt                      A       42.200.147.171
-rt                      AAAA    2001:470:18:629::2
-
-rpi-1                   AAAA    2001:470:f821:1:dea6:32ff:fe8a:6a93
-rpi-2                   AAAA    2001:470:f821:1:ba27:ebff:fef0:e9e6
-rpi-3                   AAAA    2001:470:f821:1:dea6:32ff:fe14:fd67
-rpi-4                   AAAA    2001:470:f821:1:dea6:32ff:fe14:fce9
-rpi-ext                 AAAA    2001:470:f821:1:dea6:32ff:fe95:2fcf
-juno                    AAAA    2001:470:f821:1:2fcb:b47b:1b5f:eac4
-cnc                     AAAA    2001:470:f821:1:021e:c9ff:fe75:b6d3
-zeus                    AAAA    2001:470:f821:1:9a72:a418:5466:0b9a
-hera                    AAAA    2001:470:f821:1:8406:1390:2110:5825
-chiron                  AAAA    2001:470:f821:1:addc:01ca:febc:a468
-hestia                  AAAA    2001:470:f821:1:ef18:fbec:2162:2c4c
-vulcan                  AAAA    2001:470:f821:1:a9aa:5da6:d8ee:84db
-old-nixbld              AAAA    2001:470:f821:1:021f:bcff:fe12:9170
-franz                   AAAA    2001:470:f821:1:39a9:9221:da3d:f6e2