these 3 derivations will be built:
  /nix/store/5ivnnyp1jgw9xw3v9zs01psr1b2ghc9p-treefmt.toml.drv
  /nix/store/56c1v8ilfingkzd3cs67w4m4k3mbglh1-treefmt.drv
  /nix/store/dhvl9cfj8lffs7ss10qy79vizhbgc29n-treefmt-check.drv