these 4 derivations will be built:
  /nix/store/92fmsdyvk1hs4qs8a4n32gv6l7lilik3-vendor-registry.drv
  /nix/store/fmmvzqqs053az452hp5jwa3v0ca2qv2k-vendor-cargo-deps.drv
  /nix/store/xl3cj09d45frgjyibbmyhib73q8qm2c6-harmonia-deps-3.1.0.drv
  /nix/store/26lbw29zlyqd3cc8jcmrgc05qr17prsb-harmonia-llvm-cov-3.1.0.drv