this derivation will be built:
  /nix/store/abd83mx9gsalmgymp17scdzgwnwlsjhr-nix-shell.drv
this path will be fetched (1.5 MiB download, 4.1 MiB unpacked):
  /nix/store/l92scd56x0m7d7ybdf3yrkf7k92ybbzp-cargo-llvm-cov-0.9.0