this derivation will be built:
  /nix/store/f6hk6jjgl40jvkfjw5w0hq0jkai6c0pa-nix-shell.drv
this path will be fetched (2.1 MiB download, 5.5 MiB unpacked):
  /nix/store/c3bqllgbr339vd4z4kid5l5pb2nfznfm-just-1.58.0