No Wayman <iarchivedmywholelife@gmail.com> writes:

> No Wayman <iarchivedmywholelife@gmail.com> writes:
>
>> Transient.el was added in 28.1 according to NEWS.
>> It is not a member of package--builtin-versions for any of the
>> following Emacs
>> versions: 28.1, 28.2, 29.1, 29.2.

At least on Emacs 30, (assq 'transient package--builtin-versions) gives
me a non-nil value.  I can confirm that this is the case on the emacs-29
branch.

I suspect this commit resolved the issue, since
`loaddefs-generate--parse-file' only checks the version header, not the
package-version header.

--8<---------------cut here---------------start------------->8---
commit fa5f06c1251ff717d661f05fcd240b4792054aae
Author: Jonas Bernoulli <jonas@bernoul.li>
Date:   Tue Dec 5 20:01:44 2023 +0100

    ; * lisp/transient.el: Set Version instead of Package-Version
    
    `finder-compile-keywords' only considers the "Version" header.

diff --git a/lisp/transient.el b/lisp/transient.el
--- a/lisp/transient.el
+++ b/lisp/transient.el
@@ -1,35 +1,35 @@
 ;;; transient.el --- Transient commands  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 2018-2023 Free Software Foundation, Inc.
 
 ;; Author: Jonas Bernoulli <jonas@bernoul.li>
 ;; Homepage: https://github.com/magit/transient
 ;; Keywords: extensions
 
-;; Package-Version: 0.5.2
+;; Version: 0.5.2
 ;; Package-Requires: ((emacs "26.1") (compat "29.1.4.4") (seq "2.24"))
 
 ;; SPDX-License-Identifier: GPL-3.0-or-later
 
 ;; This file is part of GNU Emacs.
 
 ;; GNU Emacs is free software: you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published
 ;; by the Free Software Foundation, either version 3 of the License,
 ;; or (at your option) any later version.
 ;;
 ;; GNU Emacs is distributed in the hope that it will be useful,
 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ;; GNU General Public License for more details.
 ;;
 ;; You should have received a copy of the GNU General Public License
 ;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 ;;; Commentary:
 
 ;; Transient is the library used to implement the keyboard-driven menus
 ;; in Magit.  It is distributed as a separate package, so that it can be
 ;; used to implement similar menus in other packages.
 
 ;;; Code:

--8<---------------cut here---------------end--------------->8---

So in general, this patch might be appropriate?