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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; 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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages lightning)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix licenses))
+
+(define-public lightning
+  (package
+    (name "lightning")
+    (version "2.0.0")
+    (source (origin
+             (method url-fetch)
+             (uri (string-append "mirror://gnu/lightning/lightning-"
+                                 version ".tar.gz"))
+             (sha256
+              (base32
+               "0m0hc9aqw72wsg2sq2hx8zwhfvz814rfr7rz9qcyn3n4qv2kc5z4"))))
+    (build-system gnu-build-system)
+    (synopsis "Library for generating assembly code at runtime")
+    (description
+     "GNU lightning is a library that generates assembly language code at
+run-time; it is very fast, making it ideal for Just-In-Time compilers, and it
+abstracts over the target CPU, as it exposes to the clients a standardized
+RISC instruction set inspired by the MIPS and SPARC chips.")
+    (home-page "http://www.gnu.org/software/lightning/")
+    (license gpl3+)))