IIRC, it uses what is defined for shell environment. Just instead of activating on your machine, it produces OCI image with that environment.
I have nixOS definitions that I can use to make a SD card image, overtake a running linux system via ssh, deploy to nixos via ssh, or deploy to a local system - all from one definition.
I have nixOS definitions that I can use to make a SD card image, overtake a running linux system via ssh, deploy to nixos via ssh, or deploy to a local system - all from one definition.