these 3 derivations will be built:
  /nix/store/w3kcgkahr9hl0vilwapazj8mjy6d5vs8-treefmt.toml.drv
  /nix/store/fq0iy4n2kj1w0byr59vir0lkc86ssh8d-treefmt.drv
  /nix/store/9s0ajp0z5n02larxknf3grb369d804xw-treefmt-check.drv
this path will be fetched (1.0 MiB download, 2.7 MiB unpacked):
  /nix/store/qz78r7vsd6hbcxz2hp679v0a0i0dpzyd-nixfmt-rs-0.4.1