--- a/debian/patches/reproducible-build.patch	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/reproducible-build.patch	2020-01-20 12:14:47.105963705 +0000
@@ -0,0 +1,30 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby@debian.org>
+Last-Update: 2020-01-20
+
+--- vmatch-2.3.0+git20200101.0.b1bd228+dfsg.orig/src/bin/vmrelease.sh
++++ vmatch-2.3.0+git20200101.0.b1bd228+dfsg/src/bin/vmrelease.sh
+@@ -22,14 +22,21 @@ cat << ENDOFRELEASEPRE
+ #define ${PROGRAM}RELEASE_H
+ ENDOFRELEASEPRE
+ 
+-date +"#define ${PROGRAM}COMPILEDATE \"%Y-%m-%d %H:%M:%S\""
++date +"#define ${PROGRAM}COMPILEDATE \"%Y-%m-%d %H:%M:%S\"" --utc --date="@${SOURCE_DATE_EPOCH:-$(date +%s)}"
+ 
+ shift # get rid of first argument
+ echo "#define ${PROGRAM}CFLAGS \"$*\""
+ 
++if [ -e "${SOURCE_DATE_EPOCH}" ]
++then
++  HOSTNAME="(reproducible build)"
++else
++  HOSTNAME="`hostname`"
++fi
++
+ cat << ENDOFRELEASEPOST
+ #define ${PROGRAM}RELEASEDATE "2007-Aug-27"
+ #define ${PROGRAM}VERSION "`cat ${WORKVSTREESRC}/VERSION`"
+-#define ${PROGRAM}COMPILEHOST "`hostname`"
++#define ${PROGRAM}COMPILEHOST "${HOSTNAME}"
+ #endif
+ ENDOFRELEASEPOST
--- a/debian/patches/series	2020-01-20 12:01:19.356205198 +0000
--- b/debian/patches/series	2020-01-20 12:12:49.580609231 +0000
@@ -4,3 +4,4 @@
 common-distdir.patch
 skip-doc-installation.patch
 hardening.patch
+reproducible-build.patch