these 5 derivations will be built:
  /nix/store/c7iavqvv16x7qfmwdqsm4k737bgqbp6i-Cargo.toml.drv
  /nix/store/invbfyyjkrgaakdplciw890ryvmxlhh7-Cargo.toml.drv
  /nix/store/67w1g8zpfxhaf8kxb93sjz7jy8s8q9an-source.drv
  /nix/store/09284g9np0d804f64d5vpnqcbgba0545-herdr-eternal-deps-0.1.0.drv
  /nix/store/6by1fkhim2d89wqwkzb5r2944gc1m4qx-herdr-eternal-0.1.0.drv