(services (append
 (list
   (udev-rules-service 'spoof-eth0-mac 
     #~(udev-rule "90-spoof-eth0-mac.rules"
       (string-append "ACTION==\"add\", SUBSYSTEM==\"net\", "
          "ATTR{address}==\"b8:27:eb:15:61:71\", "
          "RUN+=\"" #$iproute "/sbin/ip link set dev eth0 address b0:25:aa:46:63:d6\""))))
  %base-services))