• Run make menuconfig.
• Choose target and subtarget.
• Choose multiple devices option.
• Enable per-device root filesystem option.
• Choose the devices to build the image for.
• Copy those options from current .config to an empty .config.
• Run make menuconfig and enable luci-ssl.
  • Run make defconfig if you don't need to get into menuconfig.
• Run make -j$(nproc) to compile.