these 3 derivations will be built:
  /nix/store/g0hianwi7bqwdygi94j703h0i9gzckkh-treefmt.toml.drv
  /nix/store/sdhq445jf1s2cpg1r70v6dhknw0qsz4n-treefmt.drv
  /nix/store/ca7aqlzdpj2svg6gvg45xmgsycas924d-treefmt-check.drv