these 5 derivations will be built:
  /nix/store/d6hkalfqagkyy9rkvn22b2na7r4xjn18-vendor-registry.drv
  /nix/store/szd5wa79q47dn1q9q889138kfbqgybfw-vendor-cargo-deps.drv
  /nix/store/wwn1yhmbmk68vaaa0pzqzyl3pwdvqjm9-source.drv
  /nix/store/mxsy34ihiyhgk5khnw9dm65c104lvjfw-harmonia-deps-3.2.0.drv
  /nix/store/dq5hlbik2pc7arb98hgf97mvpqwcdq6c-harmonia-llvm-cov-3.2.0.drv