these 3 derivations will be built:
  /nix/store/hnkvlhx20pf9da8vjg5zj6vxlbc5npbm-treefmt.toml.drv
  /nix/store/8pjv4rii2rblm3ziisbz0bvzcdqzf6iq-treefmt.drv
  /nix/store/winlsybbf7hvjqr8jjq32g5y9p8kcy1i-treefmt-check.drv
this path will be fetched (6.0 MiB download, 18.4 MiB unpacked):
  /nix/store/47k26k98v32x56rxiqawdk5qk0r0b6w1-rustfmt-1.97.1