--- a/debian/patches/reproducible-build.patch	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/reproducible-build.patch	2020-02-08 14:38:25.778464385 +0000
@@ -0,0 +1,28 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby@debian.org>
+Last-Update: 2020-02-08
+
+--- pynwb-1.2.1.orig/src/pynwb/file.py
++++ pynwb-1.2.1/src/pynwb/file.py
+@@ -1,5 +1,6 @@
++import os
+ from datetime import datetime
+-from dateutil.tz import tzlocal
++from dateutil.tz import tzlocal, UTC
+ from collections.abc import Iterable
+ from warnings import warn
+ import copy as _copy
+@@ -306,7 +307,12 @@ class NWBFile(MultiContainerInterface):
+ 
+         self.fields['file_create_date'] = getargs('file_create_date', kwargs)
+         if self.fields['file_create_date'] is None:
+-            self.fields['file_create_date'] = datetime.now(tzlocal())
++            try:
++                file_create_date = datetime.utcfromtimestamp(int(os.environ['SOURCE_DATE_EPOCH']))
++                file_create_date = file_create_date.replace(tzinfo=UTC)
++            except KeyError:
++                file_create_date = datetime.now(tzlocal())
++            self.fields['file_create_date'] = file_create_date
+         if isinstance(self.fields['file_create_date'], datetime):
+             self.fields['file_create_date'] = [self.fields['file_create_date']]
+         self.fields['file_create_date'] = list(map(_add_missing_timezone, self.fields['file_create_date']))
--- a/debian/patches/series	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/series	2020-02-08 14:33:13.040208521 +0000
@@ -0,0 +1 @@
+reproducible-build.patch