emacs: keep the default first writable native-comp-eln-load-path dir

Fixes https://github.com/NixOS/nixpkgs/issues/247804.

Lin Jian 7d4ea94d 2d324ed8

Changed files
+8 -2
pkgs
applications
editors
+8 -2
pkgs/applications/editors/emacs/site-start.el
···
;;; Set up native-comp load path.
(when (featurep 'native-compile)
;; Append native-comp subdirectories from `NIX_PROFILES'.
+
;; Emacs writes asynchronous native-compilation files to the first writable directory[1].
+
;; At this time, (car native-comp-eln-load-path) is a writable one in `user-emacs-directory'[2].
+
;; So we keep that one unchanged.
+
;; [1]: info "(elisp) Native-Compilation Variables"
+
;; [2]: https://git.savannah.gnu.org/cgit/emacs.git/tree/lisp/startup.el?id=3685387e609753293c4518be75e77c659c3b2d8d#n601
(setq native-comp-eln-load-path
-
(append (mapcar (lambda (profile-dir)
+
(append (list (car native-comp-eln-load-path))
+
(mapcar (lambda (profile-dir)
(concat profile-dir "/share/emacs/native-lisp/"))
(nix--profile-paths))
-
native-comp-eln-load-path)))
+
(cdr native-comp-eln-load-path))))
;;; Make `woman' find the man pages
(defvar woman-manpath)