I'm trying to package Grue Hunter [1].

The game is just a single Perl file.  What directories should be created
in the store?  And how can I create such directories?

I've tried several things:

1. (zero? (system (format #f "cp -r . ~a" out)))

   Pollutes the profile with 'AGPLv3.txt', 'gh.pl', and 'README'.

2. (zero? (system (format #f "mkdir bin ~a/" out)))

   Creates 'bin', but the output doesn't contain it.

3. (zero? (system (format #f "mkdir bin ~a/" out)))
   (zero? (system (format #f "cp gh.pl ~a/bin/" out)))

   Creates a file called 'bin', not a directory.  Could anyone explain
   why?  Fails with:

   cp: cannot create regular file 
'/nix/store/clwpaljwanw7397qafxv82vj1b8jm82q-grue-hunter-1.0/bin/': Not a 
directory

I'm attaching a recipe and a related patch.

[1] http://jxself.org/grue-hunter.shtml

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 Nikita Karetnikov <nik...@karetnikov.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 grue-hunter)
  #:use-module (guix licenses)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix build-system gnu)
  #:use-module (gnu packages perl))

(define-public grue-hunter
  (package
    (name "grue-hunter")
    (version "1.0")
    (source
     (origin
      (method url-fetch)
      (uri (string-append "http://jxself.org/"; name ".tar.gz"))
      (sha256
       (base32
        "1hjcpy5439qs3v2zykis7hsi0i17zjs62gks3zd8mnfw9ni4i2h3"))))
    (build-system gnu-build-system) ; no Makefile.PL
    (arguments `(#:modules ((guix build gnu-build-system)
                            (guix build utils)
                            (srfi srfi-1))
                 #:phases
                 (alist-replace
                  'install
                  (lambda* (#:key outputs #:allow-other-keys)
                    (let ((out (assoc-ref outputs "out")))
                      ;; (zero? (system (format #f "cp -r . ~a" out)))

                      (zero? (system (format #f "mkdir bin ~a/" out)))
                      (zero? (system (format #f "cp gh.pl ~a/bin/" out)))))
                  (alist-delete
                   'configure
                   (alist-delete
                    'patch-generated-file-shebangs
                    (alist-delete
                     'build
                     (alist-delete
                      'check
                      (alist-delete
                       'patch-shebangs
                       (alist-delete
                        'strip
                        %standard-phases)))))))
                 #:tests? #f)) ; no test target
    (inputs `(("perl" ,perl)))
    (home-page "http://jxself.org/grue-hunter.shtml";)
    (synopsis "Text adventure game")
    (description
     "Grue Hunter is a text adventure game written in Perl.  You must make
your way through an underground cave system in search of the Grue.  Can you
capture it and get out alive?")
   (license agpl3+)))
From 436dc3da50aa2a82a7d47930c493ccb73a3accec Mon Sep 17 00:00:00 2001
From: Nikita Karetnikov <nik...@karetnikov.org>
Date: Tue, 14 May 2013 18:57:42 +0000
Subject: [PATCH] licenses: Add 'agpl3' and 'agpl3+'.

* guix/licenses.scm (agpl3, agpl3+): New variables.
---
 guix/licenses.scm |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/guix/licenses.scm b/guix/licenses.scm
index 9c4e177..c0a0e60 100644
--- a/guix/licenses.scm
+++ b/guix/licenses.scm
@@ -21,6 +21,7 @@
 (define-module (guix licenses)
   #:use-module (srfi srfi-9)
   #:export (license? license-name license-uri license-comment
+            agpl3 agpl3+
             asl2.0
             boost1.0
             bsd-2 bsd-3 bsd-4 bsd-style
@@ -60,6 +61,16 @@
 ;;;
 ;;; Code:
 
+(define agpl3
+  (license "AGPL 3"
+           "https://gnu.org/licenses/agpl.html";
+           "https://gnu.org/licenses/why-affero-gpl.html";))
+
+(define agpl3+
+  (license "AGPL 3+"
+           "https://gnu.org/licenses/agpl.html";
+           "https://gnu.org/licenses/why-affero-gpl.html";))
+
 (define asl2.0
   (license "ASL 2.0"
            "http://directory.fsf.org/wiki/License:Apache2.0";
-- 
1.7.5.4

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