these 3 derivations will be built:
  /nix/store/zahawcbj7qwvn7f6c8ls806ida9ch12n-treefmt.toml.drv
  /nix/store/8hqhvddqvicbyhmc2mxdrzg4k9ppjv01-treefmt.drv
  /nix/store/b0yvfhii00xwdxhj24ajykwvy9ila1dq-treefmt-check.drv