these 3 derivations will be built:
  /nix/store/vp9x9jqngy18qq9kr1ghlf4ypk8c90dd-treefmt.toml.drv
  /nix/store/67pbhhd67hqgig0wdk6h2g9rfkyblx1h-treefmt.drv
  /nix/store/fycva4jkgasnahrc4q0dn7w4xn83j06d-treefmt-check.drv