these 5 derivations will be built:
  /nix/store/97fs30zz4vrx2n0m7qsg5cgr44rw3zvq-vendor-registry.drv
  /nix/store/7jcbjj3knnl35x6hxhj8sv2xym846agr-vendor-cargo-deps.drv
  /nix/store/ysg6yc63lgp8wzk8dzwcv8w0w2mcvvpa-source.drv
  /nix/store/p5g76hcmp0frfv74iv0lrhy0ykh8za7p-harmonia-deps-3.3.0.drv
  /nix/store/a6ff8sns5nwyvi0wqwlpbynbj2ianvby-harmonia-llvm-cov-3.3.0.drv