diff --git a/nixos/modules/system/boot/plymouth.nix b/nixos/modules/system/boot/plymouth.nix
index 9b6472fea429..a1ab70938575 100644
--- a/nixos/modules/system/boot/plymouth.nix
+++ b/nixos/modules/system/boot/plymouth.nix
@@ -146,6 +146,9 @@ in
     systemd.services.systemd-ask-password-plymouth.wantedBy = [ "multi-user.target" ];
     systemd.paths.systemd-ask-password-plymouth.wantedBy = [ "multi-user.target" ];
 
+    # Prevent Plymouth taking over the screen during system updates.
+    systemd.services.plymouth-start.restartIfChanged = false;
+
     boot.initrd.systemd = {
       extraBin.plymouth = "${plymouth}/bin/plymouth"; # for the recovery shell
       storePaths = [