these 3 derivations will be built:
  /nix/store/c7hmg229y43am0yszn08pgjsvpssdbmf-home-manager-files.drv
  /nix/store/b43y6sgfnwh5arz68pi9ff4n5a7yxzmz-hm-putter.json.drv
  /nix/store/lrm8vx83mf5xybrmcds97nmd3i8l4kr4-home-manager-generation.drv