these 5 derivations will be built:
  /nix/store/0g8kkwd6pk74gffqy867x2jgw2ilf4jg-vendor-registry.drv
  /nix/store/dslpqf6nbksnqd52rjigfr65wrqb2f7j-vendor-cargo-deps.drv
  /nix/store/z2zllya4qg1758vv4wydqcnv43q9mdcs-source.drv
  /nix/store/ld84g50b9xxff7pj05d8lkgkd1rypsrw-harmonia-deps-3.3.0.drv
  /nix/store/gslr7gmxkhbr7c0880n8ijvslx95v66q-harmonia-llvm-cov-3.3.0.drv