Patch borrowed from nixpkgs.  Works around warning message produced by the
current version of Moose:

"Passing a list of values to enum is deprecated. Enum values should be wrapped
in an arrayref."

--- Net-Amazon-S3-0.60/lib/Net/Amazon/S3/Client/Object.pm	2015-04-15 16:18:47.226410022 -0500
+++ Net-Amazon-S3-0.60/lib/Net/Amazon/S3/Client/Object.pm	2015-04-15 16:19:25.410408425 -0500
@@ -19,7 +19,7 @@
     [ qw(private public-read public-read-write authenticated-read) ];
 
 enum 'StorageClass' =>
-    qw(standard reduced_redundancy);
+    [ qw(standard reduced_redundancy) ];
 
 has 'client' =>
     ( is => 'ro', isa => 'Net::Amazon::S3::Client', required => 1 );
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<div class='path'>path: <a href='/guix/log/?id=a941e8fe1f2ef47be2b30a54925febbc7dfb5389'>root</a>/<a href='/guix/log/tests?id=a941e8fe1f2ef47be2b30a54925febbc7dfb5389'>tests</a>/<a href='/guix/log/tests/gexp.scm?id=a941e8fe1f2ef47be2b30a54925febbc7dfb5389'>gexp.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/gexp.scm?id=a941e8fe1f2ef47be2b30a54925febbc7dfb5389&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-05-25 23:00:30 +0200'>2020-05-25</span></td><td><a href='/guix/commit/tests/gexp.scm?id=abf43d4511566e97f09049aa8b29453a2ed5ed16'>gexp: Fix expansion for (file-append (local-file ...) ...).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-05-25 23:00:30 +0200'>2020-05-25</span></td><td><a href='/guix/commit/tests/gexp.scm?id=e033700f17660ff936936cf89cc557b95d12bb13'>tests: Hide quoted (define-module ...) form from Geiser.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-05-16 00:34:41 +0200'>2020-05-16</span></td><td><a href='/guix/commit/tests/gexp.scm?id=644cb40cd83eff8a5bcdbd2d63887daa18228f41'>gexp: Add 'let-system'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-03-12 18:32:15 +0100'>2020-03-12</span></td><td><a href='/guix/commit/tests/gexp.scm?id=cf2ac04f13d9266c7c8a2ebd2e85ef593231ac9d'>gexp: Add 'with-parameters'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-03-08 20:28:31 +0100'>2020-03-08</span></td><td><a href='/guix/commit/tests/gexp.scm?id=9a2f99f42fdd19ac379ac85be2a8c2a34a345aa5'>gexp: Default to current target.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-01-04 23:44:26 +0100'>2020-01-04</span></td><td><a href='/guix/commit/tests/gexp.scm?id=d63ee94d63c667e0c63651d6b775460f4c67497d'>gexp: Add 'raw-derivation-file'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-12-18 22:36:37 +0100'>2019-12-18</span></td><td><a href='/guix/commit/tests/gexp.scm?id=ab7010af1f1077c056529769a53a380147c3933f'>gexp: Allow character literals in GEXP-&gt;SEXP.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-11-30 23:50:40 +0100'>2019-11-30</span></td><td><a href='/guix/commit/tests/gexp.scm?id=99c45877a984dd0148151b2e304afef6fb04f1a5'>gexp: 'local-file' properly resolves non-literal relative file names.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-09-23 23:41:19 +0200'>2019-09-23</span></td><td><a href='/guix/commit/tests/gexp.scm?id=24ab804ce11fe12ff49cd144a3d9c4bfcf55b41c'>gexp: Catch and report non-self-quoting gexp inputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-26 23:50:12 +0200'>2019-07-26</span></td><td><a href='/guix/commit/tests/gexp.scm?id=2e8cabb8d630a8423e2e5a3bf150c1c0310b945d'>gexp: 'program-file' honors the current system and cross-compilation target.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-15 10:01:05 +0200'>2019-07-15</span></td><td><a href='/guix/commit/tests/gexp.scm?id=b9373e262730578ba6c3805ffe44900f10bc655c'>gexp: 'lowered-gexp-guile' now returns a &lt;derivation-input&gt;.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-15 10:01:05 +0200'>2019-07-15</span></td><td><a href='/guix/commit/tests/gexp.scm?id=386857748097619b3b75a7bf93677b6aa742d03c'>gexp: &lt;lowered-gexp&gt; separates sources from derivation inputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-04 18:05:02 +0200'>2019-07-04</span></td><td><a href='/guix/commit/tests/gexp.scm?id=2ca41030d5189d83ea2a28ea64cf0e19efed5fd7'>gexp: Add 'lower-gexp' and express 'gexp-&gt;derivation' in terms of it.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>