these 3 derivations will be built:
  /nix/store/v2vf3xyxj6k6c8b861xj3ch1pz0sg4sg-home-manager-files.drv
  /nix/store/ki6ph8p239dx1qb6vl126v5c77yz4ib6-hm-putter.json.drv
  /nix/store/i4kb0cdzpq90d6xfznrbbg26bzxs7dp6-home-manager-generation.drv