gnu: Add nim.

* gnu/packages/nim.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add nim.scm.

gnu/local.mk

@@ -272,6 +272,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/networking.scm			\
   %D%/packages/nfs.scm                          \
   %D%/packages/nickle.scm                       \
+  %D%/packages/nim.scm  			\
   %D%/packages/ninja.scm			\
   %D%/packages/node.scm				\
   %D%/packages/noweb.scm			\

gnu/packages/nim.scm

@@ -0,0 +1,59 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 José Miguel Sánchez García <jmi2k@openmailbox.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 nim)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix download)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages))
+
+(define-public nim
+  (package
+    (name "nim")
+    (version "0.16.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append "http://nim-lang.org/download/"
+                          name "-" version ".tar.xz"))
+      (sha256
+       (base32
+        "0rsibhkc5n548bn9yyb9ycrdgaph5kq84sfxc9gabjs7pqirh6cy"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:tests? #f ; No tests.
+       #:phases
+         (modify-phases %standard-phases
+           (delete 'configure)
+           (add-after 'unpack 'patch-installer
+             (lambda* (#:key outputs #:allow-other-keys)
+               (let ((out (assoc-ref outputs "out")))
+                 (substitute* "install.sh"
+                   (("1/nim") "1"))
+                 #t)))
+           (replace 'install
+             (lambda* (#:key outputs #:allow-other-keys)
+               (let ((out (assoc-ref outputs "out")))
+                 (zero? (system* "./install.sh" out))))))))
+    (home-page "http://nim-lang.org")
+    (synopsis "Statically-typed, imperative programming language")
+    (description "Nim (formerly known as Nimrod) is a statically-typed,
+imperative programming language that tries to give the programmer ultimate power
+without compromises on runtime efficiency.  This means it focuses on compile-time
+mechanisms in all their various forms.")
+    (license license:expat)))