these 3 derivations will be built:
  /nix/store/jnc8mb9nnvqi2ismrgf3wx20r4v20zxj-treefmt.toml.drv
  /nix/store/gazifaf0saxpjjhlgfy0myjq054r4f5l-treefmt.drv
  /nix/store/3hkvmi1rcf0mlb6rdyjk5nwbailssls7-treefmt-check.drv