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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Kevin Lemonnier <lemonnierk@ulrar.net>
+;;;
+;;; 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 zsh)
+  #:use-module (gnu packages ncurses)
+  #:use-module (gnu packages perl)
+  #:use-module (gnu packages pcre)
+  #:use-module (gnu packages autotools)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix licenses))
+
+(define-public zsh
+  (package
+    (name "zsh")
+    (version "5.0.6")
+    (source (origin
+             (method url-fetch)
+             (uri (string-append "http://www.zsh.org/pub/zsh-" version
+                                 ".tar.gz"))
+             (sha256
+              (base32 "0f9y2lkv6xs5nxgj7ld7sbncy454sgamz21fm4109mxqlqa32fph"))))
+    (build-system gnu-build-system)
+    (arguments `(#:configure-flags '("--with-tcsetpgrp" "--enable-pcre")
+                 #:phases (alist-cons-before
+                           'configure 'fix-sh
+                           (lambda _
+                             (substitute*
+                                 '("configure"
+                                   "configure.ac"
+                                   "Src/exec.c"
+                                   "Src/mkmakemod.sh"
+                                   "Config/installfns.sh"
+                                   "Config/defs.mk.in"
+                                   "Test/E01options.ztst"
+                                   "Test/A05execution.ztst"
+                                   "Test/A01grammar.ztst"
+                                   "Test/B02typeset.ztst"
+                                   "Completion/Unix/Command/_init_d"
+                                   "Util/preconfig")
+                               (("/bin/sh") (which "sh"))))
+                           %standard-phases)))
+    (native-inputs `(("autoconf", autoconf)))
+    (inputs `(("ncurses", ncurses)
+              ("pcre", pcre)
+              ("perl", perl)))
+    (synopsis "Powerful shell for interactive use and scripting")
+    (description "The Z shell (zsh) is a Unix shell that can be used
+as an interactive login shell and as a powerful command interpreter
+for shell scripting. Zsh can be thought of as an extended Bourne shell
+with a large number of improvements, including some features of bash,
+ksh, and tcsh.")
+    (home-page "http://www.zsh.org/")
+
+    ;; The whole thing is under an MIT/X11-style license, but there's one
+    ;; command, 'Completion/Unix/Command/_darcs', which is under GPLv2+.
+    (license gpl2+)))