--- bluez-5.66/tools/hciattach.h.orig	2022-11-16 11:26:24.460651471 +0100
+++ bluez-5.66/tools/hciattach.h	2022-11-16 11:26:35.272572762 +0100
@@ -41,7 +41,7 @@
 #define HCI_UART_VND_DETECT	5
 
 #ifndef FIRMWARE_DIR
-#define FIRMWARE_DIR "/etc/firmware"
+#define FIRMWARE_DIR "/lib/firmware"
 #endif
 
 int read_hci_event(int fd, unsigned char *buf, int size);