I guess i forgot to add networking

modules/displayOff.nix

@@ -0,0 +1,44 @@
+{ config, pkgs, ... }:
+
+{
+  systemd.services.blank-tty1 = {
+    description = "Blank the active console (defaults to tty1)";
+    wants = [ "getty@tty1.service" ];
+    after  = [ "getty@tty1.service" ];
+    unitConfig.ConditionPathExists = "/dev/tty1";
+
+    # Put `setterm` in PATH
+    path = [ pkgs.kbd ];
+
+    serviceConfig = {
+      Type = "oneshot";
+    };
+
+    # Do exactly what worked for you, with a small fallback
+    script = ''
+      set -e
+
+      # Prefer the active VT if available; otherwise use tty1
+      TTY="$(cat /sys/class/tty/tty0/active 2>/dev/null || echo tty1)"
+
+      # Try setterm on that TTY (same redirections as your manual command)
+      if ! setterm --term linux --blank force </dev/"$TTY" >/dev/"$TTY" 2>/dev/null; then
+        # Fallback: ask the framebuffer to blank (driver-dependent)
+        for fb in /sys/class/graphics/fb*/blank; do
+          [ -w "$fb" ] && echo 1 > "$fb" && break
+        done
+      fi
+    '';
+  };
+
+  systemd.timers.blank-tty1 = {
+    wantedBy = [ "timers.target" ];
+    timerConfig = {
+      OnActiveSec = "30s";   # 30s after the timer is activated at boot
+      AccuracySec = "1s";
+      Persistent  = true;
+      Unit        = "blank-tty1.service";
+    };
+  };
+}
+