From 2e527f2f0fcf1069a5f1038eb1413caee86e883d Mon Sep 17 00:00:00 2001
From: Bastian Dehn <hhaalo@arcor.de>
Date: Wed, 13 May 2026 18:00:35 +0200
Subject: [PATCH] add build command readme for reproducible build

---
 Makefile  | 1 +
 readme.md | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/Makefile b/Makefile
index 080235e..f0057ba 100644
--- a/Makefile
+++ b/Makefile
@@ -116,4 +116,5 @@ $(BUILDDIR)/$(PACKAGENAME).deb: \
 	$(PACKAGEDIR)/DEBIAN/control
 
 	mkdir -p $(@D)
+	umask 0022
 	cd build && dpkg-deb --build --root-owner-group $(PACKAGENAME)
\ No newline at end of file
diff --git a/readme.md b/readme.md
index 4b2b3b0..20d74ea 100644
--- a/readme.md
+++ b/readme.md
@@ -9,6 +9,13 @@ it can scan many pages with cut page into multiple pdfs.
 - scantopdfgray - scan into gray pdf
 - scantopdfbw - scan into black and white pdf
 
+## Build
+
+```
+export SOURCE_DATE_EPOCH=$(git log --max-count=1 --pretty='%ct')
+make
+```
+
 ## Usage
 
 scan 5 pages into one pdf `test.pdf`
-- 
2.47.3