diff --git a/Makefile b/Makefile
index 41f02745a8..027f21c903 100644
--- a/Makefile
+++ b/Makefile
@@ -213,6 +213,13 @@ ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
 -include $(BR2_CONFIG)
 endif
 
+# timezone and locale may affect build output
+ifeq ($(BR2_REPRODUCIBLE),y)
+export TZ=UTC
+export LANG=C
+export LC_ALL=C
+endif
+
 # To put more focus on warnings, be less verbose as default
 # Use 'make V=1' to see the full commands
 ifeq ("$(origin V)", "command line")
@@ -410,6 +417,7 @@ endif
 # Scripts in support/ or post-build scripts may need to reference
 # these locations, so export them so it is easier to use
 export BR2_CONFIG
+export BR2_REPRODUCIBLE
 export TARGET_DIR
 export STAGING_DIR
 export HOST_DIR