these 3 derivations will be built:
  /nix/store/59z8mkdb3k446zv4pylahjpq1bg1mil0-vendor-cargo-deps.drv
  /nix/store/5rpyb35ya6rs7w69qcclqf2wcx9pkq6g-harmonia-deps-3.3.0.drv
  /nix/store/bw46pm1njday4zgwqg5qkfyf2jx2xx2q-harmonia-llvm-cov-3.3.0.drv