Dimaga: rebuild Khanda daily

flake.lock

@@ -313,11 +313,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1722987190,
-        "narHash": "sha256-68hmex5efCiM2aZlAAEcQgmFI4ZwWt8a80vOeB/5w3A=",
+        "lastModified": 1723282977,
+        "narHash": "sha256-oTK91aOlA/4IsjNAZGMEBz7Sq1zBS0Ltu4/nIQdYDOg=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "21cc704b5e918c5fbf4f9fff22b4ac2681706d90",
+        "rev": "a781ff33ae258bbcfd4ed6e673860c3e923bf2cc",
         "type": "github"
       },
       "original": {

hosts/Dimaga/default.nix

@@ -49,7 +49,7 @@ in
   boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
 
   # Build Nix packages for other hosts.
-  # Runs every Saturday at 4 AM
+  # Runs every day at 4 AM
   systemd.services."build-hosts" = {
     serviceConfig = {
       Type = "oneshot";
@@ -66,7 +66,7 @@ in
     after = [ "network-online.target" ];
     wantedBy = [ "timers.target" ];
     timerConfig = {
-      OnCalendar = "Sat 04:00";
+      OnCalendar = "04:00";
       Persistent = true;
       Unit = "build-hosts.service";
     };

modules/system/system.nix

@@ -46,6 +46,9 @@ in
     environment.systemPackages = cfg.corePackages ++ cfg.packages;
 
     services = {
+      # Automatically set the timezone
+      automatic-timezoned.enable = true;
+
       # Enable fwupd (firmware updater)
       fwupd.enable = true;
 
@@ -70,6 +73,14 @@ in
       };
     };
 
+    # Enable visual updates
+    system.activationScripts.diff = {
+      supportsDryActivation = true;
+      text = ''
+        ${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff /run/current-system "$systemConfig"
+      '';
+    };
+
     # Limit logout stop timer duration to 30 seconds
     systemd.user.extraConfig = ''
       DefaultTimeoutStopSec=30s