Patch from NixOS retrieved from
https://raw.githubusercontent.com/NixOS/nixpkgs/master/pkgs/development/libraries/accountsservice/drop-prefix-check-extensions.patch.

diff --git a/src/extensions.c b/src/extensions.c
index 038dcb2..830465d 100644
--- a/src/extensions.c
+++ b/src/extensions.c
@@ -122,15 +122,7 @@ daemon_read_extension_directory (GHashTable  *ifaces,
                         continue;
                 }
 
-                /* Ensure it looks like "../../dbus-1/interfaces/${name}" */
-                const gchar * const prefix = "../../dbus-1/interfaces/";
-                if (g_str_has_prefix (symlink, prefix) && g_str_equal (symlink + strlen (prefix), name)) {
-                        daemon_read_extension_file (ifaces, filename);
-                } else {
-                        g_warning ("Found accounts service vendor extension symlink %s, but it must be exactly "
-                                   "equal to '../../dbus-1/interfaces/%s' for forwards-compatibility reasons.",
-                                   filename, name);
-                }
+                daemon_read_extension_file (ifaces, filename);
         }
 
         g_dir_close (dir);
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<div class='path'>path: <a href='/guix/log/?id=00172e171ca19cf3f3471f481f8c7518adbc168d'>root</a>/<a href='/guix/log/gnu?id=00172e171ca19cf3f3471f481f8c7518adbc168d'>gnu</a>/<a href='/guix/log/gnu/packages?id=00172e171ca19cf3f3471f481f8c7518adbc168d'>packages</a>/<a href='/guix/log/gnu/packages/wicd.scm?id=00172e171ca19cf3f3471f481f8c7518adbc168d'>wicd.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/wicd.scm?id=00172e171ca19cf3f3471f481f8c7518adbc168d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2017-09-20 20:58:04 -0400'>2017-09-20</span></td><td><a href='/guix/commit/gnu/packages/wicd.scm?id=dc1d3cdef70f0e3c047c229c2a0e561d1f47bde8'>gnu: Use 'modify-phases' syntax.</a><span class='msg-avail'>...</span></td><td>Kei Kebreau</td></tr>
<tr><td><span title='2016-11-29 18:39:16 +0100'>2016-11-29</span></td><td><a href='/guix/commit/gnu/packages/wicd.scm?id=2cb64f3b1b3df338acfc0ba9f719875db21812b0'>gnu: wicd: Fix build.</a><span class='msg-avail'>...</span></td><td>Hartmut Goebel</td></tr>
<tr><td><span title='2016-09-28 17:54:50 +0300'>2016-09-28</span></td><td><a href='/guix/commit/gnu/packages/wicd.scm?id=b94a6ca074f00b3f769933d074853d3c3ca50d00'>gnu: Add and use gettext-minimal.</a><span class='msg-avail'>...</span></td><td>Alex Kost</td></tr>