these 5 derivations will be built:
  /nix/store/mk9vfki8jrrg2204pgi040j734axlpbr-vendor-registry.drv
  /nix/store/3fmjh9hhacrsr4awxmvhjy14wmhhx3wr-vendor-cargo-deps.drv
  /nix/store/4k5kq0jwrydifk654wbdnlrns4lg19bq-source.drv
  /nix/store/85pqrjqgpl0zfil9pznh7ra27kjiy7wr-harmonia-deps-3.3.0.drv
  /nix/store/adhl0b51ipyh5msgjdip1dkvg1ygawq9-harmonia-llvm-cov-3.3.0.drv