these 3 derivations will be built:
  /nix/store/1a1pgki7vx1af6riq1kik9qwy26xs5im-home-manager-files.drv
  /nix/store/06lw3rdd8k7yf2jqhy8mwj8w5pbd4g55-hm-putter.json.drv
  /nix/store/7bhi8jml89ciwdd6pddy4rsq6fn4rppr-home-manager-generation.drv