these 5 derivations will be built:
  /nix/store/23fb8vp1qbcx47i4mywp77rc94fg9daf-source.drv
  /nix/store/72h79inhc7xwa1kkwbr0y32hi8zwlr94-vendor-registry.drv
  /nix/store/2yc4wy53spdmjf312830zwgy5zdxc25y-vendor-cargo-deps.drv
  /nix/store/yyg8n1zid35bs20c2xzwsryrzv3gxb0f-harmonia-deps-3.2.0.drv
  /nix/store/j1zwg4jwr2x0pymf64inb3pd5lq1z8cd-harmonia-llvm-cov-3.2.0.drv