these 3 derivations will be built:
  /nix/store/1mppxlhdxgl6xingv8pvx37932qk9i2c-treefmt.toml.drv
  /nix/store/kw7nc7pd375f8k3lgv1lwkj0wbzarjq9-treefmt.drv
  /nix/store/xhqqs8fpnl2qp24i3azyipj2v3vcafz8-treefmt-check.drv