these 2 derivations will be built:
  /nix/store/srap85my29445w02hfvaxf7hnnyh99nj-devshell-dir.drv
  /nix/store/dk59fc2irp5qcqlk4yqggvcy6c9y6ndq-devshell.drv
this path will be fetched (0.0 KiB download, 6.5 MiB unpacked):
  /nix/store/cnn5w25g23gzyspr7dbpchd4vszq6w4z-deploy-rs-0.1.0