Index: buildout.cfg
===================================================================
--- buildout.cfg	(revisione 106858)
+++ buildout.cfg	(copia locale)
@@ -4,11 +4,11 @@
 
 [test]
 recipe = zc.recipe.testrunner
-eggs = zope.location
+eggs = zope.location [test]
 
 [coverage-test]
 recipe = zc.recipe.testrunner
-eggs = zope.location
+eggs = zope.location [test]
 defaults = ['--coverage', '../../coverage']
 
 [coverage-report]
Index: src/zope/location/configure.zcml
===================================================================
--- src/zope/location/configure.zcml	(revisione 106858)
+++ src/zope/location/configure.zcml	(copia locale)
@@ -1,7 +1,9 @@
-<configure xmlns="http://namespaces.zope.org/zope">
+<configure xmlns="http://namespaces.zope.org/zope"
+           zcml:xmlns="http://namespaces.zope.org/zcml">
 
   <adapter factory=".location.LocationProxy" />
-  <adapter factory=".pickling.LocationCopyHook" />
+  <adapter zcml:condition="installed zope.copy"
+           factory=".pickling.LocationCopyHook" />
   <adapter factory=".traversing.LocationPhysicallyLocatable" />
   <adapter factory=".traversing.RootPhysicallyLocatable" />
 
Index: src/zope/location/pickling.py
===================================================================
--- src/zope/location/pickling.py	(revisione 106858)
+++ src/zope/location/pickling.py	(copia locale)
@@ -18,13 +18,17 @@
 __docformat__ = 'restructuredtext'
 
 from zope.component import adapts
-from zope.copy.interfaces import ICopyHook, ResumeCopy
 from zope.interface import implements
-
 from zope.location.interfaces import ILocation
 from zope.location.location import inside
 
+try:
+    from zope.copy.interfaces import ICopyHook, ResumeCopy
+except ImportError:
+    raise NotImplementedError("zope.location.pickling is not supported "
+        "because zope.copy is not available")
 
+
 class LocationCopyHook(object):
     """Copy hook to preserve copying referenced objects that are not
     located inside object that's being copied.
Index: setup.py
===================================================================
--- setup.py	(revisione 106858)
+++ setup.py	(copia locale)
@@ -56,13 +56,14 @@
       packages=find_packages('src'),
       package_dir = {'': 'src'},
       namespace_packages=['zope',],
+      tests_require=['zope.copy'],
       install_requires=['setuptools',
                         'zope.interface',
                         'zope.schema>=3.5.1dev',
                         'zope.component>=3.8.0',
                         'zope.proxy>3.3',
-                        'zope.copy',
                         ],
+      extras_require=dict(test=['zope.copy']),
       include_package_data = True,
       zip_safe = False,
       )