From 625a8a8c8982026ddb3da2c5d3e37096960e8d13 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mikolai=20G=C3=BCtschow?= <mikolai.guetschow@tu-dresden.de>
Date: Fri, 22 Aug 2025 11:13:04 +0200
Subject: [PATCH] makefiles/boot/riotboot: pass BUILD_DIR to recursive Make
 call

---
 makefiles/boot/riotboot.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/makefiles/boot/riotboot.mk b/makefiles/boot/riotboot.mk
index e973bfc5c66a..06a6b7dd22e7 100644
--- a/makefiles/boot/riotboot.mk
+++ b/makefiles/boot/riotboot.mk
@@ -86,6 +86,7 @@ riotboot/flash-bootloader: riotboot/bootloader/flash
 riotboot/bootloader/%: $$(if $$(filter riotboot/bootloader/clean,$$@),,$$(BUILDDEPS) pkg-prepare)
 	$(Q)/usr/bin/env -i \
 		QUIET=$(QUIET) PATH="$(PATH)" USER="$(USER)"\
+		BUILD_DIR="$(BUILD_DIR)"\
 		INCLUDES="$(INCLUDES)"\
 		EXTERNAL_BOARD_DIRS="$(EXTERNAL_BOARD_DIRS)" BOARD=$(BOARD) \
 		OPENOCD_DEBUG_ADAPTER=$(OPENOCD_DEBUG_ADAPTER) \