--- a/build_tools/make_build_h
+++ b/build_tools/make_build_h
@@ -5,6 +5,14 @@ MACHINE=`uname -m  | sed 's/\\\\/\\\\\\\
 OS=`uname -s`
 USER=`id | awk -F")" '{print $1}'| awk -F"(" '{print $2}' | sed 's/\\\\/\\\\\\\\/g'`
 DATE=`date -u "+%Y-%m-%d %H:%M:%S"`
+if [ -n "${SOURCE_DATE_EPOCH}" ]; then
+	# building reproducibly, faking some data
+	HOSTNAME='openwrt.org'
+	KERNEL='unknown'
+	MACHINE='unknown'
+	USER='nobody'
+	DATE=`date -u "+%Y-%m-%d %H:%M:%S" -d @${SOURCE_DATE_EPOCH}`
+fi
 cat << END
 /*
  * build.h
--- a/build_tools/make_xml_documentation
+++ b/build_tools/make_xml_documentation
@@ -187,7 +187,7 @@ printf "Building Documentation For: "
 for subdir in ${mod_subdirs} ; do
 	printf "%s " "${subdir}"
 	subdir_path="${source_tree}/${subdir}"
-	for i in $(${FIND} "${subdir_path}" -name '*.c' -or -name '*.cc'); do
+	for i in $(${FIND} "${subdir_path}" -name '*.c' -or -name '*.cc' | LC_ALL=C sort); do
 		if [ "${with_moduleinfo}" -eq "1" ] ; then
 			MODULEINFO=$(${AWK} -f "${source_tree}/build_tools/get_moduleinfo" "${i}")
 			if [ "${MODULEINFO}" != "" ] ; then