guix: Add manifest.

* build-aux/manifest.scm: New file.

build-aux/manifest.scm

@@ -0,0 +1,20 @@
+;;; Mes --- Maxwell Equations of Software
+;;; Copyright © 2018 Jan Nieuwenhuizen <janneke@gnu.org>
+
+;;; This file is part of Mes.
+;;;
+;;; Mes 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.
+;;;
+;;; Mes 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 Mes.  If not, see <http://www.gnu.org/licenses/>.
+
+(include "../guix.scm")
+(packages->manifest (map cadr (package-direct-inputs mes)))