>> diff --git a/lisp/emacs-lisp/package.el b/lisp/emacs-lisp/package.el
>> index 8d2e2f09108..7a69e680880 100644
>> --- a/lisp/emacs-lisp/package.el
>> +++ b/lisp/emacs-lisp/package.el
>> @@ -5,9 +5,12 @@
>>  ;; Author: Tom Tromey <tromey@redhat.com>
>>  ;;         Daniel Hackney <dan@haxney.org>
>>  ;; Created: 10 Mar 2007
>> -;; Version: 1.1.0
>> +;; Version: 1.1.1-pre
>>  ;; Keywords: tools
>> -;; Package-Requires: ((tabulated-list "1.0"))
>> +;; Package-Requires: ((emacs "26.1") (compat "29"))
>
> I suggest to require the newest Compat 30.
>
>> +;; This is a GNU ELPA :core package.  Avoid functionality that is not
>> +;; compatible with the version of Emacs recorded above.
>>  
>>  ;; This file is part of GNU Emacs.
>>  
>> @@ -147,6 +150,7 @@
>>  (eval-when-compile (require 'subr-x))
>>  (eval-when-compile (require 'epg))      ;For setf accessors.
>>  (eval-when-compile (require 'inline))   ;For `define-inline'
>> +(require 'compat nil 'noerror)
>>  (require 'seq)
>
> (require 'compat) without the noerror argument should work, since we
> have the compat.el stub in Emacs.
>
>>  (require 'tabulated-list)
>> @@ -1151,7 +1155,8 @@ package--native-compile-async
>>    "Native compile installed package PKG-DESC asynchronously.
>>  This assumes that `pkg-desc' has already been activated with
>>  `package-activate-1'."
>> -  (when (native-comp-available-p)
>> +  (when (and (fboundp 'native-comp-available-p)
>> +             (native-comp-available-p))
>>      (let ((warning-minimum-level :error))
>>        (native-compile-async (package-desc-dir pkg-desc) t))))
>
> `native-comp-available-p' is provided by Compat. You can use it
> directly. It aliases `ignore' on Emacs 27 and older.
>
>>        ;; Insert news if available.
>>        (when news
>> -        (insert "\n" (make-separator-line) "\n"
>> -                (propertize "* News" 'face 'package-help-section-name)
>> +        (insert "\n" (make-separator-line) "\n")
>> +        (when (fboundp 'make-separator-line)
>> +          (insert (make-separator-line) "\n"))
>> +        (insert (propertize "* News" 'face 'package-help-section-name)
>>                  "\n\n")
>>          (insert-file-contents news))
>
> `make-separator-line' is provided by Compat.
>
> Daniel