these 3 derivations will be built:
  /nix/store/w2yas3m83rfy863kcqa6flm78yxi3r8y-treefmt.toml.drv
  /nix/store/6f8avfaxv1rfnqrnl8d9q8hf47iinflq-treefmt.drv
  /nix/store/s8xclnvlyggphkwxjr192qhicbk3y74b-treefmt-check.drv