Index: pytz-2016.10/pytz/__init__.py
===================================================================
--- pytz-2016.10.orig/pytz/__init__.py
+++ pytz-2016.10/pytz/__init__.py
@@ -81,19 +81,7 @@ def open_resource(name):
     for part in name_parts:
         if part == os.path.pardir or os.path.sep in part:
             raise ValueError('Bad path segment: %r' % part)
-    filename = os.path.join(os.path.dirname(__file__),
-                            '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
-        # pkg_resources is installed.
-        try:
-            from pkg_resources import resource_stream
-        except ImportError:
-            resource_stream = None
-
-        if resource_stream is not None:
-            return resource_stream(__name__, 'zoneinfo/' + name)
+    filename = os.path.join('/usr/share/zoneinfo', *name_parts)
     return open(filename, 'rb')
 
 
Index: pytz-2016.10/pytz/tzfile.py
===================================================================
--- pytz-2016.10.orig/pytz/tzfile.py
+++ pytz-2016.10/pytz/tzfile.py
@@ -127,7 +127,7 @@ def build_tzinfo(zone, fp):
 if __name__ == '__main__':
     import os.path
     from pprint import pprint
-    base = os.path.join(os.path.dirname(__file__), 'zoneinfo')
+    base = '/usr/share/zoneinfo'
     tz = build_tzinfo('Australia/Melbourne',
                       open(os.path.join(base,'Australia','Melbourne'), 'rb'))
     tz = build_tzinfo('US/Eastern',