these 3 derivations will be built:
  /nix/store/v9l2pf97np8r4grhnciqy3zc2rp1m1h8-treefmt.toml.drv
  /nix/store/l54x0hzr060rzc97mffyw730avmplf91-treefmt.drv
  /nix/store/7752mn58zalj3fwfqjj7mqk265mfjx12-treefmt-check.drv