diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index bcdc88ff63df..a3bff27626d8 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -121,7 +121,7 @@ let
       "final.target"
       "kexec.target"
       "systemd-kexec.service"
-    ] ++ lib.optional (cfg.package.withUtmp or true) "systemd-update-utmp.service" ++ [
+    ] ++ lib.optional cfg.package.withUtmp "systemd-update-utmp.service" ++ [
 
       # Password entry.
       "systemd-ask-password-console.path"