From: Chris Lamb <lamby@debian.org>
Date: Fri, 6 Sep 2019 09:41:09 +0200
Subject: make the build reproducible

---
 Makefile.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile.in b/Makefile.in
index 225bea2..490f18d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -21,6 +21,7 @@ UPDATETEX = $(MKTEXLSR) /usr/share/texmf /var/spool/texmf $(BASETEXDIR) > /dev/n
 MAJORVN=1
 MINORVN=41
 VERSION=$(MAJORVN).$(MINORVN)
+BUILD_DATE="$(shell date)"
 
 OCAMLBEST=@OCAMLBEST@
 
@@ -75,7 +76,7 @@ debug: $(CAML_CMO) $(CAMLLEX_CMO) $(CMO)
 
 version.ml: Makefile
 	echo "let version = \""$(VERSION)"\"" > version.ml
-	echo "let date = \""`date`"\"" >> version.ml
+	echo "let date = \""$(BUILD_DATE)"\"" >> version.ml
 
 install-indep:
 	mkdir -p $(BINDIR)
