these 5 derivations will be built:
  /nix/store/0a2p1fjh72cqlbpkgq8dh18m273k4l4y-source.drv
  /nix/store/sh2wk9gxxwmmsacq6lah43r082kjx5bw-vendor-registry.drv
  /nix/store/gsvx7mdxaxw5smxfcsqiccpsr4jv61qq-vendor-cargo-deps.drv
  /nix/store/parsxzfkvj4bq0in77mjrngrn4nhrwz3-harmonia-deps-3.3.0.drv
  /nix/store/pmcllkfz5pd361i5sgm15np6f2s1f5qj-harmonia-llvm-cov-3.3.0.drv