these 5 derivations will be built:
  /nix/store/da3ydpynbyirg41dchai56dx3da3l0d6-source.drv
  /nix/store/sn1v3hxh4vdnmjagrl9ircw6d4m9xyvq-vendor-registry.drv
  /nix/store/yvrw4n2j01j54fnwgrg5670n2xk2f1fz-vendor-cargo-deps.drv
  /nix/store/9vqdfpzhlb8wa8vwzhsnn68jwmda30lm-harmonia-deps-3.1.0.drv
  /nix/store/ckxsdny776qsip8lk1y2467srbyknxqn-harmonia-llvm-cov-3.1.0.drv