diff --git a/pytz/__init__.py b/pytz/__init__.py
index a1f75b6..f2a2330 100644
--- a/pytz/__init__.py
+++ b/pytz/__init__.py
@@ -92,8 +92,7 @@ def open_resource(name):
     if zoneinfo_dir is not None:
         filename = os.path.join(zoneinfo_dir, *name_parts)
     else:
-        filename = os.path.join(os.path.dirname(__file__),
-                                'zoneinfo', *name_parts)
+        filename = os.path.join('/usr/share/zoneinfo', *name_parts)
         if not os.path.exists(filename):
             # http://bugs.launchpad.net/bugs/383171 - we avoid using this
             # unless absolutely necessary to help when a broken version of
diff --git a/setup.py b/setup.py
index e31ff2b..ba6926b 100644
--- a/setup.py
+++ b/setup.py
@@ -15,14 +15,8 @@ me = 'Stuart Bishop'
 memail = 'stuart@stuartbishop.net'
 packages = ['pytz']
 resources = ['zone.tab', 'locales/pytz.pot']
-for dirpath, dirnames, filenames in os.walk(os.path.join('pytz', 'zoneinfo')):
-    # remove the 'pytz' part of the path
-    basepath = dirpath.split(os.path.sep, 1)[1]
-    resources.extend([os.path.join(basepath, filename) for filename in filenames])
 package_data = {'pytz': resources}
 
-assert len(resources) > 10, 'zoneinfo files not found!'
-
 setup(
     name='pytz',
     version=pytz.VERSION,