- "addip=setenv bootargs $(bootargs) " \
- "ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask)" \
- ":$(hostname):$(netdev):off panic=1\0" \
+ "addip=setenv bootargs ${bootargs} " \
+ "ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}" \
+ ":${hostname}:${netdev}:off panic=1\0" \