these 3 derivations will be built:
  /nix/store/p8zfa2s493viv9fyfr0j6gxxppkin9b6-treefmt.toml.drv
  /nix/store/wb6q86rz39hgvgzazgkpzvqgc7nwz5c5-treefmt.drv
  /nix/store/vbw21vgvpzvmwxd4fxqyr6x96g4kibnj-treefmt-check.drv