these 3 derivations will be built:
  /nix/store/383mh50wl480l9v5rmw27902z0j5szbp-treefmt.toml.drv
  /nix/store/s1q3zs50cllgy2jmknkq5zs75a91mzqx-treefmt.drv
  /nix/store/418gdyaazlg8iilp71lls4kz344lwfz4-treefmt-check.drv