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=9ba804af7aac2a16fcd2686e702a72700fac1ffe'>root</a>/<a href='/guix/log/gnu?id=9ba804af7aac2a16fcd2686e702a72700fac1ffe'>gnu</a>/<a href='/guix/log/gnu/packages?id=9ba804af7aac2a16fcd2686e702a72700fac1ffe'>packages</a>/<a href='/guix/log/gnu/packages/file-systems.scm?id=9ba804af7aac2a16fcd2686e702a72700fac1ffe'>file-systems.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/gnu/packages/file-systems.scm?id=9ba804af7aac2a16fcd2686e702a72700fac1ffe&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-06-10 17:25:17 +0200'>2020-06-10</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=bf8e10051be091fdb81576fdcf58aee8f5afe6b2'>gnu: fsarchiver: Use HTTPS home page URI.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/file-systems.scm (fsarchiver)[home-page]: Use HTTPS URI.
</span></span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2020-06-03 18:05:56 +0200'>2020-06-03</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=4960a955f8f77cc4c35d0db749cd6f3de8787bff'>gnu: Add mergerfs-tools.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/storage.scm (mergerfs-tools): New variable.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2020-06-03 18:05:56 +0200'>2020-06-03</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=639bcf205d55c7a0c6d0894b4e7a814a86d3b9a9'>gnu: Add mergerfs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/storage.scm (mergerfs): New variable.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2020-05-28 23:03:01 -0400'>2020-05-28</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=d7aef3ab59837b9ed8abbe199debf8ed687f6782'>gnu: Add exfatprogs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/file-systems.scm (exfatprogs): New public variable.

Signed-off-by: Leo Famulari &lt;leo@famulari.name&gt;
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-05-27 23:04:08 -0400'>2020-05-27</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=023eea68f53a6d2979f558fc7590f43aee3aff43'>gnu: apfs-fuse: Update to 0.0.0-1.7b89418.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/file-systems.scm (apfs-fuse): Update to 0.0.0-1.7b89418.
[arguments]: Install the README. Select FUSE 2 in #:configure-flags.
</span></span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2020-05-25 17:27:30 -0700'>2020-05-25</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=2f04adf5c4e4be8e44e2bf753d4e0a87f9149c7e'>gnu: disorderfs: Update to 0.5.10.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/file-systems (disorderfs): Update to 0.5.10.
</span></span></td><td>Vagrant Cascadian</td></tr>
<tr><td><span title='2020-05-13 00:21:47 +0200'>2020-05-13</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=0f30fe7ebbf57f6ea0d19be1204aa4b740a2cde4'>gnu: fsarchiver: Edit synopsis &amp; description.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/file-systems.scm (fsarchiver)[synopsis, description]:
Fix spelling (file system, lose, …).  Edit for grammar and style (‘…allows you
to…’).  Provide more information about the package.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-05-13 00:21:47 +0200'>2020-05-13</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=c341b2addd29de5a04938987d55f319cfad81e96'>gnu: fsarchiver: Move to (gnu packages file-systems).</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/disk.scm (fsarchiver): Move this variable…
* gnu/packages/file-systems.scm (fsarchiver): …here.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-05-09 23:31:27 +0300'>2020-05-09</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=ed7f4d33b82c7ab3598f0b568a8be35122d4dd62'>gnu: zfs: Add missing input.</a><span class='msg-avail'>...<span class='msg-tooltip'>Reported by ecbrown on IRC.

* gnu/packages/file-systems.scm (zfs)[native-inputs]: Add kmod.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-05-08 21:40:51 +0200'>2020-05-08</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=4bdf4182fe080c3409f6ef9b410146b67cfa2595'>Merge branch 'core-updates'</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-05-08 16:00:00 +0200'>2020-05-08</span></td><td><a href='/guix/commit/gnu/packages/file-systems.scm?id=4c88ae7b0331a7d671321a345eacc2bdb7595ee5'>gnu: Add gphotofs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/file-systems.scm (gphotofs): New variable.

Signed-off-by: Danny Milosavljevic &lt;dannym@scratchpost.org&gt;
</span></span></td><td>Raghav Gururajan</td></tr>