I want to add files that will be used at the end of the install via preseed/late_command. Those will be a script that will get executed as well as some files the script will use.At the moment, I have a checkout of debian-installer package and can build the netboot iso with make build_netboot (from within build subdirectory).
How to add arbitrary files to my custom Debian Installer image
debian;debian installer
Create a local config override file and use EXTRAFILES variable to specify those files, example (assuming you are inside build/ on debian-installer checkout):echo 'EXTRAFILES = script.sh file1.txt file.json' > config/localFrom there on, build the netboot iso:make build_netboot