these 3 derivations will be built:
  /nix/store/xpqr83pbgq8471zr1571y07blwsgfgwy-treefmt.toml.drv
  /nix/store/zl7wbkj2nz8hmqz349nqvdznqm12jhj0-treefmt.drv
  /nix/store/zh3rljwhb5m4xkd9fbpns4pppjc9vnvn-treefmt-check.drv