these 5 derivations will be built:
  /nix/store/vhah9kikhqws2inz6iz9avpi05r2nava-vendor-registry.drv
  /nix/store/cf312mdfn8s9fz05p4rqj5x06pl838vb-vendor-cargo-deps.drv
  /nix/store/xlsgmjhbhiin5y3f0vqgcbk6ff02iki3-source.drv
  /nix/store/bkwpv32xp1rc03p9ggc80qkpzn6dyfsa-harmonia-deps-3.2.0.drv
  /nix/store/fqg72yf0s1l1m6cndjwawhx5783lcw1z-harmonia-llvm-cov-3.2.0.drv