these 2 derivations will be built:
  /nix/store/5dz8hqn1zijqjd8qc1bq4xapi79ljsai-cargo-vendor-dir.drv
  /nix/store/qh3wvhgrvxngwrfkk1fm5r7cg75b6cv6-flake-fmt-1.0.0.drv