these 3 derivations will be built:
  /nix/store/ml8i1frrn2k0937p3mq98qcq9hn28wz0-treefmt.toml.drv
  /nix/store/slbw89ldybk028a33fzl5hj6m69drl7v-treefmt.drv
  /nix/store/bj8qlkj0kjfmxfgjkc1gkyl1anri25x6-treefmt-check.drv