these 3 derivations will be built:
  /nix/store/cp3bsv3xj4072qdilb39a91b037wrpwm-treefmt.toml.drv
  /nix/store/3bdzwnq7g1hqb0vk6gp78n4cm2q07wam-treefmt.drv
  /nix/store/39shpy0l6xbyixhl202nm0xcvn9aixm0-treefmt-check.drv