these 2 derivations will be built:
  /nix/store/zxjp66s2b73zmcc1cl6g3jjz1lcm0r0s-config.toml.drv
  /nix/store/vdbia0aqbdgbggwv6hl1sfgz5p10bpbq-nix-shell.drv
this path will be fetched (1.6 MiB download, 4.3 MiB unpacked):
  /nix/store/r39r1cjsy9c2dvv7rjj7gsq24winamwv-cargo-llvm-cov-0.9.0