these 5 derivations will be built:
  /nix/store/pagl1g0hi84xl6sic5g2q31r2072z5wp-vendor-registry.drv
  /nix/store/03aa00l9p4zrak2w8fpj5ql0p8z5hbwy-vendor-cargo-deps.drv
  /nix/store/847y8v6529fxbcirx4rq0x8cfdr43bbq-source.drv
  /nix/store/gc1xpyb5517r1w4v56bm18lmdvkm89gd-harmonia-deps-3.2.0.drv
  /nix/store/jxapz0zr4f2siin6m39f1znwqp0jdnhg-harmonia-llvm-cov-3.2.0.drv