these 3 derivations will be built:
  /nix/store/h74101s8xwmw0xrfqdkqjlahwmj4r8gr-home-manager-files.drv
  /nix/store/cia58k2inw3wv19ybbybyw8xjwaklbzl-hm-putter.json.drv
  /nix/store/nfnqvf3n6shyzg00k04qry06r7q4h5lk-home-manager-generation.drv