these 3 derivations will be built:
  /nix/store/diygb6qkim3lnnh1qrsqqqvvfi1q47p3-home-manager-files.drv
  /nix/store/5kv1agw7wv4nzylx9l6105f907c2fizv-hm-putter.json.drv
  /nix/store/ydl54qvrqni5n4sb14wybskcl0vcv1z6-home-manager-generation.drv