diff --git a/build-package.sh b/build-package.sh
index 990fa2e307..1cf185d2e9 100755
--- a/build-package.sh
+++ b/build-package.sh
@@ -30,8 +30,7 @@ source "$TERMUX_SCRIPTDIR/scripts/utils/docker/docker.sh"; docker__create_docker
 # Functions for working with packages
 source "$TERMUX_SCRIPTDIR/scripts/utils/package/package.sh"
 
-SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct 2>/dev/null || date "+%s")
-export SOURCE_DATE_EPOCH
+export SOURCE_DATE_EPOCH=${SOURCE_DATE_EPOCH:-$(git log -1 --pretty=%ct 2>/dev/null || date "+%s")}
 
 if [ "$(uname -o)" = "Android" ] || [ -e "/system/bin/app_process" ]; then
 	if [ "$(id -u)" = "0" ]; then
diff --git a/scripts/build/termux_create_pacman_subpackages.sh b/scripts/build/termux_create_pacman_subpackages.sh
index 11538c0a43..d12c97c92b 100644
--- a/scripts/build/termux_create_pacman_subpackages.sh
+++ b/scripts/build/termux_create_pacman_subpackages.sh
@@ -82,9 +82,6 @@ termux_create_pacman_subpackages() {
 		local SUB_PKG_INSTALLSIZE
 		SUB_PKG_INSTALLSIZE=$(du -bs . | cut -f 1)
 
-		local BUILD_DATE
-		BUILD_DATE=$(date +%s)
-
 		local PKG_DEPS_SPC=" ${TERMUX_PKG_DEPENDS//,/} "
 		if [ -z "$TERMUX_SUBPKG_DEPEND_ON_PARENT" ] && [ "${PKG_DEPS_SPC/ $SUB_PKG_NAME /}" = "$PKG_DEPS_SPC" ]; then
 			# Does pacman supports versioned dependencies?
@@ -113,7 +110,7 @@ termux_create_pacman_subpackages() {
 			echo "pkgver = $TERMUX_PKG_FULLVERSION_FOR_PACMAN"
 			echo "pkgdesc = $(echo "$TERMUX_SUBPKG_DESCRIPTION" | tr '\n' ' ')"
 			echo "url = $TERMUX_PKG_HOMEPAGE"
-			echo "builddate = $BUILD_DATE"
+			echo "builddate = $SOURCE_DATE_EPOCH"
 			echo "packager = $TERMUX_PKG_MAINTAINER"
 			echo "size = $SUB_PKG_INSTALLSIZE"
 			echo "arch = $SUB_PKG_ARCH"
@@ -163,7 +160,7 @@ termux_create_pacman_subpackages() {
 			echo "pkgver = $TERMUX_PKG_FULLVERSION_FOR_PACMAN"
 			echo "pkgarch = $SUB_PKG_ARCH"
 			echo "packager = $TERMUX_PKG_MAINTAINER"
-			echo "builddate = $BUILD_DATE"
+			echo "builddate = $SOURCE_DATE_EPOCH"
 		} > .BUILDINFO
 
 		# Write package installation hooks.
@@ -200,6 +197,9 @@ termux_create_pacman_subpackages() {
 				PKG_FORMAT="xz";;
 		esac
 
+		# ensure all elements of the package have the same mtime
+		find . -exec touch -h -d @$SOURCE_DATE_EPOCH {} +
+
 		# Create the actual .pkg file:
 		local TERMUX_SUBPKG_PACMAN_FILE=$TERMUX_OUTPUT_DIR/${SUB_PKG_NAME}${DEBUG}-${TERMUX_PKG_FULLVERSION_FOR_PACMAN}-${SUB_PKG_ARCH}.pkg.tar.${PKG_FORMAT}
 		shopt -s dotglob globstar
@@ -207,6 +207,7 @@ termux_create_pacman_subpackages() {
 			--options='!all,use-set,type,uid,gid,mode,time,size,md5,sha256,link' \
 			--null --files-from - --exclude .MTREE | \
 			gzip -c -f -n > .MTREE
+		touch -d @$SOURCE_DATE_EPOCH .MTREE
 		printf '%s\0' **/* | bsdtar --no-fflags -cnf - --null --files-from - | \
 			$COMPRESS > "$TERMUX_SUBPKG_PACMAN_FILE"
 		shopt -u dotglob globstar
diff --git a/scripts/build/termux_step_create_pacman_package.sh b/scripts/build/termux_step_create_pacman_package.sh
index e68729ea9d..1c5acb3f46 100644
--- a/scripts/build/termux_step_create_pacman_package.sh
+++ b/scripts/build/termux_step_create_pacman_package.sh
@@ -37,9 +37,6 @@ termux_step_create_pacman_package() {
 
 	local PACMAN_FILE=$TERMUX_OUTPUT_DIR/${TERMUX_PKG_NAME}${DEBUG}-${TERMUX_PKG_FULLVERSION_FOR_PACMAN}-${TERMUX_ARCH}.pkg.tar.${PKG_FORMAT}
 
-	local BUILD_DATE
-	BUILD_DATE=$(date +%s)
-
 	if [ "$TERMUX_GLOBAL_LIBRARY" = "true" ] && [ "$TERMUX_PACKAGE_LIBRARY" = "glibc" ]; then
 		test ! -z "$TERMUX_PKG_DEPENDS" && TERMUX_PKG_DEPENDS=$(package__add_prefix_glibc_to_package_list "$TERMUX_PKG_DEPENDS")
 		test ! -z "$TERMUX_PKG_BREAKS" && TERMUX_PKG_BREAKS=$(package__add_prefix_glibc_to_package_list "$TERMUX_PKG_BREAKS")
@@ -57,7 +54,7 @@ termux_step_create_pacman_package() {
 		echo "pkgver = $TERMUX_PKG_FULLVERSION_FOR_PACMAN"
 		echo "pkgdesc = $(echo "$TERMUX_PKG_DESCRIPTION" | tr '\n' ' ')"
 		echo "url = $TERMUX_PKG_HOMEPAGE"
-		echo "builddate = $BUILD_DATE"
+		echo "builddate = $SOURCE_DATE_EPOCH"
 		echo "packager = $TERMUX_PKG_MAINTAINER"
 		echo "size = $TERMUX_PKG_INSTALLSIZE"
 		echo "arch = $TERMUX_ARCH"
@@ -115,19 +112,23 @@ termux_step_create_pacman_package() {
 		echo "pkgver = $TERMUX_PKG_FULLVERSION_FOR_PACMAN"
 		echo "pkgarch = $TERMUX_ARCH"
 		echo "packager = $TERMUX_PKG_MAINTAINER"
-		echo "builddate = $BUILD_DATE"
+		echo "builddate = $SOURCE_DATE_EPOCH"
 	} > .BUILDINFO
 
 	# Write installation hooks.
 	termux_step_create_debscripts
 	termux_step_create_pacman_install_hook
 
+	# ensure all elements of the package have the same mtime
+	find . -exec touch -h -d @$SOURCE_DATE_EPOCH {} +
+
 	# Create package
 	shopt -s dotglob globstar
 	printf '%s\0' **/* | bsdtar -cnf - --format=mtree \
 		--options='!all,use-set,type,uid,gid,mode,time,size,md5,sha256,link' \
 		--null --files-from - --exclude .MTREE | \
 		gzip -c -f -n > .MTREE
+	touch -d @$SOURCE_DATE_EPOCH .MTREE
 	printf '%s\0' **/* | bsdtar --no-fflags -cnf - --null --files-from - | \
 		$COMPRESS > "$PACMAN_FILE"
 	shopt -u dotglob globstar