these 3 derivations will be built:
  /nix/store/c1yxl7v60sigasbb1y2b63071zmmj0h6-treefmt.toml.drv
  /nix/store/n6lvij5i7dfp4cwklkhbd7ys1hf5vcm6-treefmt.drv
  /nix/store/rrzylarq50mssiaqdxc66lz7sryl2azn-treefmt-check.drv