these 3 derivations will be built:
  /nix/store/pw3dqn8br74zz3306c4rm7y19cj71155-treefmt.toml.drv
  /nix/store/yliblss134kh44c7bz428m1jnhl2y6n0-treefmt.drv
  /nix/store/inlb7hkpdfzy6465r1zx6c22s09g6hzn-treefmt-check.drv