If you were only looking for a replication of a machine config you have running at the moment, without the ability to add extra packages, then you can create your own ISO.
This post https://www.reddit.com/r/NixOS/comments/y1xo2u/how_to_create_an_iso_with_my_config_files/ has more information.
If you were only looking for a replication of a machine config you have running at the moment, without the ability to add extra packages, then you can create your own ISO.
This post https://www.reddit.com/r/NixOS/comments/y1xo2u/how_to_create_an_iso_with_my_config_files/ has more information.