these 5 derivations will be built:
  /nix/store/8dcq56jcqv3hmisb2v83m4i9lp44mksn-source.drv
  /nix/store/v2kkl8dm44ccv1i5d27n1n23dzmy415l-vendor-registry.drv
  /nix/store/w0c0djknzzxx34v5jamn5mv3ljl7q4zp-vendor-cargo-deps.drv
  /nix/store/x77h0xv5iqvpndpr0b2bvigz43v93cm2-harmonia-deps-3.3.0.drv
  /nix/store/za27amhsybi574bh66lbh9y0a304brb1-harmonia-llvm-cov-3.3.0.drv