### Migrate to a Newer Version of Nixpkgs
```bash
# Determine the channel name you're using
nix-channel --list
nix-channel --remove <OLD_CHANNEL>
nix-channel --add <NEW_CHANNEL> # ie https://nixos.org/channels/nixos-25.05
nix-channel --update

# Now upgrade system profile (log to file in case of failure)
nixos-rebuild boot --upgrade | tee rebuild.log
```

### Finding New Things to Do
`man 5 configuration.nix` is incredibly useful
	similar info can be found at https://mynixos.com/options

### For your curiosity
1. https://wiki.nixos.org/wiki/Firejail