--- a/debian/patches/reproducible-build.patch	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/reproducible-build.patch	2020-06-19 11:22:52.988136344 +0100
@@ -0,0 +1,26 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby@debian.org>
+Last-Update: 2020-06-19
+
+--- python-pyqtgraph-0.11.0.orig/doc/source/conf.py
++++ python-pyqtgraph-0.11.0/doc/source/conf.py
+@@ -11,6 +11,7 @@
+ # All configuration values have a default; values that are commented out
+ # serve to show the default.
+ 
++import time
+ import sys
+ import os
+ from datetime import datetime
+@@ -46,7 +47,10 @@ master_doc = 'index'
+ 
+ # General information about the project.
+ project = 'pyqtgraph'
+-copyright = '2011 - {}, Luke Campagnola'.format(datetime.now().year)
++now = datetime.utcfromtimestamp(
++    int(os.environ.get('SOURCE_DATE_EPOCH', time.time()))
++)
++copyright = '2011 - {}, Luke Campagnola'.format(now.year)
+ 
+ # The version info for the project you're documenting, acts as replacement for
+ # |version| and |release|, also used in various other places throughout the
--- a/debian/patches/series	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/series	2020-06-19 11:22:51.908128280 +0100
@@ -0,0 +1 @@
+reproducible-build.patch