diff --git a/package/busybox/busybox.mk b/package/busybox/busybox.mk
index bf3b8aeec8..3748df8eb0 100644
--- a/package/busybox/busybox.mk
+++ b/package/busybox/busybox.mk
@@ -303,11 +303,11 @@ endef
 # Add /bin/{a,hu}sh to /etc/shells otherwise some login tools like dropbear
 # can reject the user connection. See man shells.
 define BUSYBOX_INSTALL_ADD_TO_SHELLS
-	if grep -q CONFIG_ASH=y $(@D)/.config; then \
+	if grep -q CONFIG_ASH=y $(BUSYBOX_DIR)/.config; then \
 		grep -qsE '^/bin/ash$$' $(TARGET_DIR)/etc/shells \
 		|| echo "/bin/ash" >> $(TARGET_DIR)/etc/shells; \
 	fi
-	if grep -q CONFIG_HUSH=y $(@D)/.config; then \
+	if grep -q CONFIG_HUSH=y $(BUSYBOX_DIR)/.config; then \
 		grep -qsE '^/bin/hush$$' $(TARGET_DIR)/etc/shells \
 		|| echo "/bin/hush" >> $(TARGET_DIR)/etc/shells; \
 	fi