switch-to-configuration-ng

This program implements the switching/updating of NixOS systems. It starts with the exising running configuration at /run/current-system and handles the migration to a new configuration, built from a NixOS configuration's config.system.build.toplevel derivation.

For more information on what happens during a switch, see what-happens-during-a-system-switch.

Build in a devshell

cd ./pkgs/by-name/sw/switch-to-configuration-ng
nix-shell ../../../.. -A switch-to-configuration-ng
cd ./src
cargo build