these 6 derivations will be built:
  /nix/store/8v7acdci2xlad3rpd073dbfr2lf1qd0c-source.drv
  /nix/store/sw9kpz9699fhlz623k4vg5n49awjw35a-cargo-package-http-range-0.1.6.drv
  /nix/store/m0n9xja7ksvz0rs7bsmdln0pinkg7ixj-vendor-registry.drv
  /nix/store/p4xxmpcpx75qcj14dpsqxn7xh0xdj2qs-vendor-cargo-deps.drv
  /nix/store/zr8nrgrpacmr2kznf2pn1aqg2pg2j9b7-harmonia-deps-3.3.0.drv
  /nix/store/nwqrrh3fz5vvymxwjmx1hwgrl8d6s085-harmonia-llvm-cov-3.3.0.drv