$ ./librem5-flash-image --help
usage: librem5-flash-image [-h] [--dir DIR] [--dist DIST] [--skip-cleanup] [--skip-flash] [--download-attempts DOWNLOAD_ATTEMPTS] [--variant {plain,luks}] [--board {devkit,librem5r2,librem5r3,librem5r4}]
[--debug] [--image-job IMAGE_JOB] [--uboot-job UBOOT_JOB] [--udev]
Flash a Librem 5 or Librem 5 Devkit.
options:
-h, --help show this help message and exit
--dir DIR Download files to dir (instead of a temporary directory)
--dist DIST Download an image for this distribution, default is 'byzantium'
--skip-cleanup Skip temporary directory cleanup
--skip-flash Do all the preparations but don't flash
--download-attempts DOWNLOAD_ATTEMPTS
Maximum number of attempts to resume image download. 0: unlimited, default is 10
--variant {plain,luks}
Image variant to download ( plain, luks ), default is 'plain'
--board {devkit,librem5r2,librem5r3,librem5r4}
Type of the board to download ( devkit, librem5r2, librem5r3, librem5r4 ) default is 'auto'
Testing and debugging options:
--debug Enable debug output
--image-job IMAGE_JOB
Jenkins job to download the image from
--uboot-job UBOOT_JOB
Jenkins job to download the uboot from
Initial setup options:
--udev Setup udev rules to flash without root permissions
The part you’re asking for is:
--variant {plain,luks}
Image variant to download ( plain, luks ), default is 'plain'