these 4 derivations will be built:
  /nix/store/9gvhapq5n0kdvdi8rihg5fns0q28d63v-vendor-registry.drv
  /nix/store/07hh3pf9ai2swrqj2z6fgakmb8q97yc2-vendor-cargo-deps.drv
  /nix/store/dps6cs0bfrlards2mjf6gcafnkahd6f1-harmonia-deps-3.2.0.drv
  /nix/store/4drsyz8sp019wmv7xldr01ky08mmhw1n-harmonia-llvm-cov-3.2.0.drv