diff --git a/nixos/modules/installer/tools/auto-upgrade.nix b/nixos/modules/installer/tools/auto-upgrade.nix
index b2676b05a02..dd8663a12db 100644
--- a/nixos/modules/installer/tools/auto-upgrade.nix
+++ b/nixos/modules/installer/tools/auto-upgrade.nix
@@ -67,7 +67,7 @@ let cfg = config.system.autoUpgrade; in
           HOME = "/root";
         };
 
-      path = [ pkgs.gnutar pkgs.xz config.nix.package ];
+      path = [ pkgs.gnutar pkgs.xz.bin config.nix.package ];
 
       script = ''
         ${config.system.build.nixos-rebuild}/bin/nixos-rebuild test ${toString cfg.flags}