commit f4debdce3de8da1bd401d8542c5acbfaa0982b76
Author: Bernhard M. Wiedemann <githubbmw@lsmod.de>
Date:   Wed Jan 25 03:52:14 2017 +0000

    allow to override build date
    
    to enable reproducible builds.
    See https://reproducible-builds.org/ for why this is good
    and https://reproducible-builds.org/specs/source-date-epoch/
    for the definition of this variable.

Index: pgm/version_generator.py
===================================================================
--- pgm.orig/version_generator.py
+++ pgm/version_generator.py
@@ -4,8 +4,9 @@ import os
 import platform
 import time
 
-build_date = time.strftime ("%Y-%m-%d")
-build_time = time.strftime ("%H:%M:%S")
+timestamp = time.gmtime(int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
+build_date = time.strftime ("%Y-%m-%d", timestamp)
+build_time = time.strftime ("%H:%M:%S", timestamp)
 build_rev = filter (str.isdigit, "$Revision$")
 
 print """