these 5 derivations will be built:
  /nix/store/280h47c2s7f9qg56nc34n07w9im5wqaj-source.drv
  /nix/store/l6sxagiqc2084my4y52j5slcabyzrj2w-vendor-registry.drv
  /nix/store/pf7c2a75bjfrkrqc55cp3qgbyrdzkl8c-vendor-cargo-deps.drv
  /nix/store/m5hzs47pbigmm31ffghknk5i34h69a43-harmonia-deps-3.3.0.drv
  /nix/store/pw54jv8ympd8fgshymw8byvrzmfvaqyd-harmonia-llvm-cov-3.3.0.drv