these 3 derivations will be built:
  /nix/store/3hnysmny1ismq06k1c7h7p6fr9myxrsb-treefmt.toml.drv
  /nix/store/3zxy9m60s1g8r66fvwzi275kblak8n7m-treefmt.drv
  /nix/store/prdsym1adfs898p66skwx0mqdicdv7xv-treefmt-check.drv