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diff --git a/etc/indent-code.el b/etc/indent-code.el
new file mode 100755
index 0000000000..255ffb126b
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+++ b/etc/indent-code.el
@@ -0,0 +1,116 @@
+:;exec emacs --batch --quick --load="$0" --funcall=main "$@"
+;;; indent-code.el --- Run Emacs to indent a package definition.
+
+;; Copyright © 2017 Alex Kost <alezost@gmail.com>
+;; Copyright © 2017 Ludovic Courtès <ludo@gnu.org>
+;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+
+;; This file is part of GNU Guix.
+
+;; GNU Guix 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 Guix 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 <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This scripts indents the given file or package definition in the specified
+;; file using Emacs.
+
+;;; Code:
+
+;; Load Scheme indentation rules from ".dir-locals.el".
+(with-temp-buffer
+  (scheme-mode)
+  (let ((default-directory (file-name-as-directory load-file-name))
+        (enable-local-variables :all))
+    (hack-dir-local-variables)
+    (hack-local-variables-apply)))
+
+;; Add indentation info for Scheme constructs that are not Guix-specific.
+;; This is normally provided by Geiser but this file is for people who may not
+;; be running Geiser, so we just copy it here (from 'geiser-syntax.el').
+(defmacro guix-syntax--scheme-indent (&rest pairs)
+  `(progn ,@(mapcar (lambda (p)
+                      `(put ',(car p) 'scheme-indent-function ',(cadr p)))
+                    pairs)))
+
+(guix-syntax--scheme-indent
+ (and-let* 1)
+ (case-lambda 0)
+ (catch defun)
+ (class defun)
+ (dynamic-wind 0)
+ (guard 1)
+ (let*-values 1)
+ (let-values 1)
+ (let/ec 1)
+ (letrec* 1)
+ (match 1)
+ (match-lambda 0)
+ (match-lambda* 0)
+ (match-let scheme-let-indent)
+ (match-let* 1)
+ (match-letrec 1)
+ (opt-lambda 1)
+ (parameterize 1)
+ (parameterize* 1)
+ (receive 2)
+ (require-extension 0)
+ (syntax-case 2)
+ (test-approximate 1)
+ (test-assert 1)
+ (test-eq 1)
+ (test-equal 1)
+ (test-eqv 1)
+ (test-group-with-cleanup 1)
+ (test-runner-on-bad-count! 1)
+ (test-runner-on-bad-end-name! 1)
+ (test-runner-on-final! 1)
+ (test-runner-on-group-begin! 1)
+ (test-runner-on-group-end! 1)
+ (test-runner-on-test-begin! 1)
+ (test-runner-on-test-end! 1)
+ (test-with-runner 1)
+ (unless 1)
+ (when 1)
+ (while 1)
+ (with-exception-handler 1)
+ (with-syntax 1))
+
+
+(defun main ()
+  (pcase command-line-args-left
+    (`(,file-name ,package-name)
+     ;; Indent the definition of PACKAGE-NAME in FILE-NAME.
+     (find-file file-name)
+     (goto-char (point-min))
+     (if (re-search-forward (concat "^(define\\(-public\\) +"
+                                    package-name)
+                            nil t)
+         (let ((indent-tabs-mode nil))
+           (beginning-of-defun)
+           (indent-sexp)
+           (save-buffer)
+           (message "Done!"))
+       (error "Package '%s' not found in '%s'"
+              package-name file-name)))
+    (`(,file-name)
+     ;; Indent all of FILE-NAME.
+     (find-file file-name)
+     (let ((indent-tabs-mode nil))
+       (indent-region (point-min) (point-max))
+       (save-buffer)
+       (message "Done!")))
+    (x
+     (error "Usage: indent-code.el FILE [PACKAGE]"))))
+
+;;; indent-code.el ends here