+id_rsa.pub:
+ ssh-keygen -b 2048 -t rsa -N '' -f id_rsa
+
+files/etc/network/interfaces.d/wifi: wifi.tmpl
+ sed 's;#WIFI-SSID#;${WIFI-SSID};; s;#WIFI-PASS#;${WIFI-PASS};;' <'$<' >'$@'
+ chmod 644 '$@'
+
+files/root/.ssh/authorized_keys: id_rsa.pub
+ mkdir -p files/root/.ssh/
+ cat '$<' >>'$@'
+ chmod 700 files/root/ files/root/.ssh/
+ chmod 600 '$@'
+
+raspi.img: raspi_root/ files/ partitions files/root/.ssh/authorized_keys files/etc/network/interfaces.d/wifi