--- a/debian/patches/reproducible-build.patch	1969-12-31 19:00:00.000000000 -0500
--- b/debian/patches/reproducible-build.patch	2019-03-20 22:21:10.095700424 -0400
@@ -0,0 +1,24 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby@debian.org>
+Last-Update: 2019-03-20
+
+--- toil-3.18.0.orig/docs/conf.py
++++ toil-3.18.0/docs/conf.py
+@@ -18,6 +18,7 @@ import inspect
+ import re
+ from datetime import datetime
+ import toil.version
++import time
+ 
+ # This makes the modules located in docs/vendor/sphinxcontrib available to import
+ sphinxPath = os.path.abspath(os.path.join(os.path.pardir, os.path.dirname('docs/vendor/sphinxcontrib/')))
+@@ -100,7 +101,8 @@ master_doc = 'index'
+ 
+ # General information about the project.
+ project = u'Toil'
+-copyright = u'2015 – %i UCSC Computational Genomics Lab' % datetime.now().year
++build_date = datetime.utcfromtimestamp(int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
++copyright = u'2015 – %i UCSC Computational Genomics Lab' % build_date.year
+ author = u'UCSC Computational Genomics Lab'
+ 
+ # The version info for the project you're documenting, acts as replacement for
--- a/debian/patches/series	2019-03-20 22:18:48.271032509 -0400
--- b/debian/patches/series	2019-03-20 22:21:08.851751370 -0400
@@ -8,3 +8,4 @@
 fix_tests
 soften-pytest-depends
 soften-mesos-deps
+reproducible-build.patch