these 3 derivations will be built:
  /nix/store/xzhy13np1b95pzw3xn8ch46zn1z7akj1-home-manager-files.drv
  /nix/store/z5m1kvs9rv9cdd12cibhmykcsfd47s5d-hm-putter.json.drv
  /nix/store/cavj4042wlqjdkv3wi64k7i512xwi16q-home-manager-generation.drv