diff --git a/krebs/3modules/tv/default.nix b/krebs/3modules/tv/default.nix
index 3315dd157..d44c322aa 100644
--- a/krebs/3modules/tv/default.nix
+++ b/krebs/3modules/tv/default.nix
@@ -391,11 +391,13 @@ with import <stockholm/lib>;
     zu = {
       cores = 4;
       nets = {
-        #gg23 = {
-        #  ip4.addr = "";
-        #  aliases = ["zu.gg23"];
-        #  ssh.port = 11423;
-        #};
+        gg23 = {
+          ip4.addr = "10.23.1.39";
+          aliases = [
+            "zu.gg23"
+          ];
+          ssh.port = 11423;
+        };
         retiolum = {
           ip4.addr = "10.243.13.40";
           ip6.addr = "42:0:0:0:0:0:0:1340";
diff --git a/tv/1systems/nomic.nix b/tv/1systems/nomic.nix
index 7d6a1d682..5469fffd5 100644
--- a/tv/1systems/nomic.nix
+++ b/tv/1systems/nomic.nix
@@ -7,7 +7,7 @@ with import <stockholm/lib>;
 
   imports = [
     ../.
-    ../2configs/hw/AO753.nix
+    ../2configs/hw/x220.nix
     ../2configs/exim-retiolum.nix
     ../2configs/git.nix
     ../2configs/im.nix
@@ -25,6 +25,16 @@ with import <stockholm/lib>;
     ];
   };
 
+  # Don't use UEFI because current disk was partitioned/formatted for AO753.
+  # TODO remove following bool.loader section after repartitioning/reformatting
+  boot.loader = {
+    grub = {
+      device = "/dev/sda";
+      splashImage = null;
+    };
+    systemd-boot.enable = mkForce false;
+  };
+
   fileSystems."/" =
     { device = "/dev/mapper/nomic1-root";
       fsType = "btrfs";
diff --git a/tv/2configs/default.nix b/tv/2configs/default.nix
index 8852100e2..ea97b1957 100644
--- a/tv/2configs/default.nix
+++ b/tv/2configs/default.nix
@@ -14,7 +14,7 @@ with import <stockholm/lib>;
       stockholm.file = "/home/tv/stockholm";
       nixpkgs.git = {
         url = https://github.com/NixOS/nixpkgs;
-        ref = "728a9578e31a0f78f6ad07a3a2ec706ec5290f10";
+        ref = "81428dd022c26764e9066d381ece90b1e88bd0d2";
       };
     } // optionalAttrs host.secure {
       secrets-master.file = "/home/tv/secrets/master";