these 3 derivations will be built:
  /nix/store/gkbxk4x0ar9q9zxzi208qrqyxa6y19xh-treefmt.toml.drv
  /nix/store/1q2g8b93y9b4wr4a7iqfylyc3mpmghza-treefmt.drv
  /nix/store/m7alqphqp195bhkxylj1gm42bg32kaha-treefmt-check.drv