these 5 derivations will be built:
  /nix/store/5p02x78jdqc3fhwxhhz47vy96p1xkbws-source.drv
  /nix/store/d8qbk5karbr8d131kvlrzyn5ldwpm0jj-vendor-registry.drv
  /nix/store/c4dckm1pvw49hkij21w9b67vg0mm518r-vendor-cargo-deps.drv
  /nix/store/0dhkk09hjx3qx0c3q10da81f4nhjgcn5-harmonia-deps-3.1.0.drv
  /nix/store/8h7sp05605whffl33fgnv9rkhyykrdjf-harmonia-llvm-cov-3.1.0.drv