these 5 derivations will be built:
  /nix/store/dq3crhc7y4ab3y6sgrwr3pwrzm7in3q5-vendor-registry.drv
  /nix/store/5zhq9f6c2xdld7z871winj660yb4fcxc-vendor-cargo-deps.drv
  /nix/store/j2in2i1x5rickzmafj476hlxk40hha89-source.drv
  /nix/store/niakwhxqk6rpghyfv324glklzz8frzyn-harmonia-deps-3.2.0.drv
  /nix/store/iy85wdk6gz599wd987q396p3rap0a3g4-harmonia-llvm-cov-3.2.0.drv