these 3 derivations will be built:
  /nix/store/frfq4b3imfbwwzsj0rb7c6s4s4yk8khc-home-manager-files.drv
  /nix/store/qqjmbpir0vbpk9nihmp9a671igfv4nnw-hm-putter.json.drv
  /nix/store/g972cc49nmx84gsasg8sivcb92hf2xfh-home-manager-generation.drv