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+;;; guix.scm --- Additional functions for Emacs Guix
+
+;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
+
+;; Emacs-Guix-Misc 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.
+;;
+;; Emacs-Guix-Misc 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 Emacs-Redshift.
+;; If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This file contains Guix package for development version of
+;; Emacs-Guix-Misc.  To build or install, run:
+;;
+;;   guix build --file=guix.scm
+;;   guix package --install-from-file=guix.scm
+
+;;; Code:
+
+(use-modules ((guix licenses) #:prefix license:)
+             (guix build utils)
+             (guix build-system emacs)
+             (guix gexp)
+             (guix git-download)
+             (guix packages)
+             (ice-9 popen)
+             (ice-9 rdelim))
+
+(define %source-dir (dirname (current-filename)))
+
+(define (git-output . args)
+  "Execute 'git ARGS ...' command and return its output without trailing
+newspace."
+  (with-directory-excursion %source-dir
+    (let* ((port   (apply open-pipe* OPEN_READ "git" args))
+           (output (read-string port)))
+      (close-port port)
+      (string-trim-right output #\newline))))
+
+(define (current-commit)
+  (git-output "log" "-n" "1" "--pretty=format:%H"))
+
+(let ((commit (current-commit)))
+  (package
+    (name "emacs-guix-misc")
+    (version (string-append "0.0.1" "-" (string-take commit 7)))
+    (source (local-file %source-dir
+                        #:recursive? #t
+                        #:select? (git-predicate %source-dir)))
+    (build-system emacs-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'chdir-elisp
+           ;; Elisp directory is not in root of the source.
+           (lambda _
+             (chdir "lisp"))))))
+    (home-page "https://github.com/wigust/emacs-guix-misc")
+    (synopsis "Additional functions for Emacs Guix")
+    (description
+     "This package provides an additional functionality for Emacs Guix.")
+    (license license:gpl3+)))
+
+;;; guix.scm ends here