these 3 derivations will be built:
  /nix/store/13405y3nxdqs2ki6ajkrzrzyly29fxxy-treefmt.toml.drv
  /nix/store/fa7im139s8zqsngndv1nr7dc0a7a3wd8-treefmt.drv
  /nix/store/jn616awc2qf3fqqqmaq0ddnj4cnjk0pc-treefmt-check.drv
this path will be fetched (1.1 MiB download, 2.7 MiB unpacked):
  /nix/store/43knykz40pxl4iwakl0nhnkgbbd62vdy-nixfmt-rs-0.4.1