these 7 derivations will be built:
  /nix/store/iwjmq311x2x4fxzs72iz0cg60plx8k6j-cargo-src-syn-3.0.9.drv
  /nix/store/qa5sqc1hy1q0m9nfqdl4ajqs6y9diiqm-cargo-package-syn-3.0.9.drv
  /nix/store/clx0a363cypnw1vwqymwcabj3h2bhwsq-vendor-registry.drv
  /nix/store/1g5zv311k0xsdy1qi70x3a9j54w4rabv-vendor-cargo-deps.drv
  /nix/store/4wkzp6dvppckc9yh7vc43cp62gj3f2xk-source.drv
  /nix/store/jmgnzbk8k7wysd3321bj86q2n8bnpimq-harmonia-deps-3.3.0.drv
  /nix/store/8hz9rf8f6wx5hf1ky7b3kx36fjya1aa9-harmonia-llvm-cov-3.3.0.drv