who needs temporary files and tee and whatever when you can have BASH SCRIPTS :3

switch.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+script_path=$(readlink -f "${BASH_SOURCE[0]}")
+flake=$(dirname "$script_path")
+
+configuration=$(sudo nixos-rebuild dry-activate --flake "$flake" --keep-going "$@")
+echo "$configuration"
+
+nix run --inputs-from "$flake" nixpkgs#nvd -- diff /run/current-system "$configuration"
+
+read -n1 -rp "Activate new configuration? [y/N] " answer
+echo
+
+if [[ $answer =~ ^[Yy]$ ]]; then
+  sudo "$configuration/bin/switch-to-configuration" switch
+else
+  echo "Not activating :("
+  exit 1
+fi