these 3 derivations will be built:
  /nix/store/nksn5qmhzy84vp4bknhwfwjgiwisyvlr-treefmt.toml.drv
  /nix/store/yqw78pka3y2fv7qpc7bivxyrh3d7d93g-treefmt.drv
  /nix/store/q96ay90i8hzn0wmc3mc40idiriqj674h-treefmt-check.drv