these 3 derivations will be built:
  /nix/store/r43i6slrh0pimc8w3aisla083lhk1a3n-treefmt.toml.drv
  /nix/store/s4x3kp7y685s6758xd8cvji26dcmgr59-treefmt.drv
  /nix/store/gdq5b3337dg0gqkxl6rf0960b741wws1-treefmt-check.drv