these 3 derivations will be built:
  /nix/store/4pr6ah9sg4z7gpjacj511abdjipdjx9b-home-manager-files.drv
  /nix/store/cflwb6aajdj7jfh02hgjk68r9b04d2w2-hm-putter.json.drv
  /nix/store/5hs5wbpsr5nbp2rqajyig77v4mjzzlks-home-manager-generation.drv