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
@@ -121,16 +121,7 @@ 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);
cm'>log</a><a href='/guix/tree/gnu/packages/cppi.scm?id=6bb934340e6ce1eaf884a41a6432be56b8b41526'>tree</a><a href='/guix/commit/gnu/packages/cppi.scm?id=6bb934340e6ce1eaf884a41a6432be56b8b41526'>commit</a><a href='/guix/diff/gnu/packages/cppi.scm?id=6bb934340e6ce1eaf884a41a6432be56b8b41526'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/cppi.scm'>
<input type='hidden' name='id' value='6bb934340e6ce1eaf884a41a6432be56b8b41526'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=6bb934340e6ce1eaf884a41a6432be56b8b41526'>root</a>/<a href='/guix/log/gnu?id=6bb934340e6ce1eaf884a41a6432be56b8b41526'>gnu</a>/<a href='/guix/log/gnu/packages?id=6bb934340e6ce1eaf884a41a6432be56b8b41526'>packages</a>/<a href='/guix/log/gnu/packages/cppi.scm?id=6bb934340e6ce1eaf884a41a6432be56b8b41526'>cppi.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/cppi.scm?id=6bb934340e6ce1eaf884a41a6432be56b8b41526&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>