these 3 derivations will be built:
  /nix/store/2fqaly7q43121az8y5spspwxgbi6k7yd-treefmt.toml.drv
  /nix/store/6ffxjxs69ryjn35lfi3zgxmndq71lk79-treefmt.drv
  /nix/store/zf7nsl0lckx5hipx5ysvwqqzdvlc41ql-treefmt-check.drv