these 3 derivations will be built:
  /nix/store/qs4z5v7arrcv8y2jn4gsj2hz09fmvzgg-treefmt.toml.drv
  /nix/store/3ay0hc6bq30hb2cl843pa3agg442qrj4-treefmt.drv
  /nix/store/xyfrcy9fxxpc4jkh4s9hxm8pign0xan5-treefmt-check.drv