these 7 derivations will be built:
  /nix/store/2gfqnqdlfsaxnzjz0z13z3n6v3cc157n-source.drv
  /nix/store/gd6f6d0951l2hmvfw5569kv4b9qg3z75-cargo-package-toml_writer-1.1.2+spec-1.1.0.drv
  /nix/store/klf214axgpnhwfzfc0pjybfn5givibrr-cargo-package-toml-1.1.3+spec-1.1.0.drv
  /nix/store/ls8riyibfjgjm2rxn511imb3kcksvawb-vendor-registry.drv
  /nix/store/qzwa3wdhgq7x012apr95a5a7m8sdr8h2-vendor-cargo-deps.drv
  /nix/store/qbxgg8smz9ccpacfci7pppvxy9srz27x-harmonia-deps-3.2.0.drv
  /nix/store/aclzhd161425ypyxx7baj7vr817gd0is-harmonia-llvm-cov-3.2.0.drv