diff -uNr qemu-2.12.1/include/net/net.h qemu-2.12.1.mod/include/net/net.h
--- qemu-2.12.1/include/net/net.h	2018-08-03 00:48:53.000000000 +0300
+++ qemu-2.12.1.mod/include/net/net.h	2018-09-17 16:27:46.984062401 +0300
@@ -217,8 +217,8 @@
 int net_hub_id_for_client(NetClientState *nc, int *id);
 NetClientState *net_hub_port_find(int hub_id);
 
-#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
-#define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
+#define DEFAULT_NETWORK_SCRIPT "@TERMUX_PREFIX@/etc/qemu-ifup"
+#define DEFAULT_NETWORK_DOWN_SCRIPT "@TERMUX_PREFIX@/etc/qemu-ifdown"
 #define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
 #define DEFAULT_BRIDGE_INTERFACE "br0"