these 5 derivations will be built:
  /nix/store/bvvn453nv5ji553lpzg5dzgvnmx9wv9d-source.drv
  /nix/store/cf5x2qgkrhqllj8mm9j906y9dmmwl9y0-vendor-registry.drv
  /nix/store/wvr3gyirjvmzw4v8r6card5vg2s4x66n-vendor-cargo-deps.drv
  /nix/store/8mliwxz8agj6rf2rvisdcvxdx35wnpjp-harmonia-deps-3.3.0.drv
  /nix/store/6wzm4gpikj9vjdh7chrj6p6wbf70rdq9-harmonia-llvm-cov-3.3.0.drv