these 3 derivations will be built:
  /nix/store/p9g81p5n3qmi3a2nv6w4r6wqn7s88s3y-treefmt.toml.drv
  /nix/store/dc7rlfdkdfm9ihi0j6blzz2y4lj8z4dm-treefmt.drv
  /nix/store/malmss6ksqrbrhpr9s3gm05hk9b3cd4k-treefmt-check.drv