these 5 derivations will be built:
  /nix/store/9glndfsj66n17a3n782xc26ia8j87jq7-vendor-registry.drv
  /nix/store/g1l5c9iq8f668n412w08xava4ja52z91-source.drv
  /nix/store/l71yknrw88xwckmnmcgn67zl3h9qgvwl-vendor-cargo-deps.drv
  /nix/store/z5x83s2dd8inxq67b3q81i2vij6iwc92-harmonia-deps-3.3.0.drv
  /nix/store/wkrkkkw3dznx816yhlirgcyzdx1z6wqx-harmonia-llvm-cov-3.3.0.drv