these 3 derivations will be built:
  /nix/store/952a5rkvl1dxxia8k3b9i6ha2w5gvxr0-treefmt.toml.drv
  /nix/store/ay7bpxv734j7fdac5mjk22iglysnrvpw-treefmt.drv
  /nix/store/f1n7jygrx370ya5p0v6pq4rg5bzwyx72-treefmt-check.drv