these 5 derivations will be built:
  /nix/store/1l7h537ihzkya44l4jdwy2qnsh04mlxs-source.drv
  /nix/store/izkcxsi5khlra5x4595aw8522l5dhpc1-vendor-registry.drv
  /nix/store/rwgc4zxz531qrff5d0wc1hhrdi8c2ahp-vendor-cargo-deps.drv
  /nix/store/9sxiq0v8kcxsws32rrxj33s29gjyhzmw-harmonia-deps-3.3.0.drv
  /nix/store/l4wx63gfxhiwwm25q3a7bdp2mczmmdhv-harmonia-llvm-cov-3.3.0.drv