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diff --git a/emacs/guix-external.el b/emacs/guix-external.el
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--- a/emacs/guix-external.el
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@@ -1,88 +0,0 @@
-;;; guix-external.el --- External programs  -*- lexical-binding: t -*-
-
-;; Copyright © 2015 Alex Kost <alezost@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 file provides auxiliary code for running external programs.
-
-;;; Code:
-
-(require 'cl-lib)
-(require 'guix-config)
-
-(defgroup guix-external nil
-  "Settings for external programs."
-  :group 'guix)
-
-(defcustom guix-guile-program guix-config-guile-program
-  "Name of the 'guile' executable used for Guix REPL.
-May be either a string (the name of the executable) or a list of
-strings of the form:
-
-  (NAME . ARGS)
-
-Where ARGS is a list of arguments to the guile program."
-  :type 'string
-  :group 'guix-external)
-
-(defcustom guix-dot-program
-  (if (file-name-absolute-p guix-config-dot-program)
-      guix-config-dot-program
-    (executable-find "dot"))
-  "Name of the 'dot' executable."
-  :type 'string
-  :group 'guix-external)
-
-(defcustom guix-dot-default-arguments
-  '("-Tpng")
-  "Default arguments for 'dot' program."
-  :type '(repeat string)
-  :group 'guix-external)
-
-(defcustom guix-dot-file-name-function #'guix-png-file-name
-  "Function used to define a file name of a temporary 'dot' file.
-The function is called without arguments."
-  :type '(choice (function-item guix-png-file-name)
-                 (function :tag "Other function"))
-  :group 'guix-external)
-
-(defun guix-dot-arguments (output-file &rest args)
-  "Return a list of dot arguments for writing a graph into OUTPUT-FILE.
-If ARGS is nil, use `guix-dot-default-arguments'."
-  (or guix-dot-program
-      (error (concat "Couldn't find 'dot'.\n"
-                     "Set guix-dot-program to a proper value")))
-  (cl-list* guix-dot-program
-            (concat "-o" output-file)
-            (or args guix-dot-default-arguments)))
-
-(defun guix-dot-file-name ()
-  "Call `guix-dot-file-name-function'."
-  (funcall guix-dot-file-name-function))
-
-(defun guix-png-file-name ()
-  "Return '.png' file name in the `temporary-file-directory'."
-  (concat (make-temp-name
-           (concat (file-name-as-directory temporary-file-directory)
-                   "guix-emacs-graph-"))
-          ".png"))
-
-(provide 'guix-external)
-
-;;; guix-external.el ends here