these 3 derivations will be built:
  /nix/store/jzgw49wmx3b8zryvnjly7hk6j6k4xri1-home-manager-files.drv
  /nix/store/mbjhqymkh1f9965l26y6253q0fi08hdf-hm-putter.json.drv
  /nix/store/kpk1wcbilfp5niiy0hhxysbib00wg1z0-home-manager-generation.drv