these 3 derivations will be built:
  /nix/store/kvz4y7gmhjbgb1vnha8dhc2q3cla5g5z-treefmt.toml.drv
  /nix/store/sd1n69l9kaj1jgslbiqbc55z73zn5j68-treefmt.drv
  /nix/store/c3a1nn4dnf05cjdnamp2iq2lwjidnnvr-treefmt-check.drv