diff --git a/meshtasticd/Makefile b/meshtasticd/Makefile
index 8f51fc0..125a9ca 100644
--- a/meshtasticd/Makefile
+++ b/meshtasticd/Makefile
@@ -121,6 +121,7 @@ BUILD_FLAGS := \
 	TARGET_LDFLAGS="$(TARGET_LDFLAGS)" \
 	TARGET_OBJCOPY="$(TARGET_CROSS)objcopy" \
 	TARGET_RANLIB="$(TARGET_RANLIB)" \
+	PLATFORMIO_CORE_DIR="$(PKG_BUILD_DIR)/.platformio" \
 	PLATFORMIO_BUILD_CACHE_DIR="$(PKG_BUILD_DIR)/.pio-build-cache" \
 	PLATFORMIO_CACHE_DIR="$(DL_DIR)/platformio-cache"