these 5 derivations will be built:
  /nix/store/w3kyfbzf9ljmsnz1jka49nsmb788djz8-vendor-registry.drv
  /nix/store/78hsk5ybcvglh1a65sjdhaa024j97bll-vendor-cargo-deps.drv
  /nix/store/srvdx4apj7kxlm1f2f4y2q21jvsianrl-source.drv
  /nix/store/hwrfyni8m4zshjjavnwq4qkmcrympi5f-harmonia-deps-3.1.0.drv
  /nix/store/c1g4dqrqddvilq9fz11cs8rainv4cd6p-harmonia-llvm-cov-3.1.0.drv