these 3 derivations will be built:
  /nix/store/j2rn63rmcplxi865dc08i0hkrn5j24qv-home-manager-files.drv
  /nix/store/91ddlhmmym21q4xy89dxxw8j1pmnx0w7-hm-putter.json.drv
  /nix/store/qn7akz7b078yry22224rk6a7y9r5gprl-home-manager-generation.drv