From 8ecf3e04f7dc0df348cf5a5ec99c125d68d0d4de Mon Sep 17 00:00:00 2001
From: Jason Madden <jamadden@gmail.com>
Date: Thu, 28 Sep 2017 14:47:25 -0500
Subject: [PATCH] Drop dependency on zope.preference.

---
 CHANGES.rst                            | 3 +++
 setup.py                               | 3 +--
 src/nti/externalization/configure.zcml | 3 ---
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/CHANGES.rst b/CHANGES.rst
index 2d064a1..08bd401 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -35,3 +35,6 @@
   be registered locally with ``z3c.baseregistry`` (previously they
   were always registered in the global site manager).
   See https://github.com/NextThought/nti.externalization/issues/28
+- Drop dependency on ``zope.preference``. It was not used by this
+  package, although our ``configure.zcml`` did include it. If you use
+  ``zope.preference``, please include it in your own ZCML file.
diff --git a/setup.py b/setup.py
index d7d3b1f..2ede5f7 100755
--- a/setup.py
+++ b/setup.py
@@ -73,8 +73,7 @@ def _read(fname):
         'zope.intid',
         'zope.lifecycleevent',
         'zope.location',
-        'zope.mimetype',
-        'zope.preference',
+        'zope.mimetype >= 2.3.0',
         'zope.proxy',
         'zope.schema',
         'zope.security',
diff --git a/src/nti/externalization/configure.zcml b/src/nti/externalization/configure.zcml
index 589d95c..39ce157 100644
--- a/src/nti/externalization/configure.zcml
+++ b/src/nti/externalization/configure.zcml
@@ -10,9 +10,6 @@
 
 	<include package="zope.annotation" />
 
-	<include package="zope.preference" file="meta.zcml" />
-	<include package="zope.preference" />
-
 	<subscriber	provides=".interfaces.IExternalMappingDecorator"
 				for="zope.dublincore.interfaces.IDCExtended"
 				factory=".dublincore.DCExtendedExternalMappingDecorator" />