these 6 derivations will be built:
  /nix/store/5dnswi5b6mbdxs9zxasqy64j5qzywnhx-source.drv
  /nix/store/7sbzp7rlwax0xbh3mx33s1m1pk704w1y-cargo-package-serde_json-1.0.151.drv
  /nix/store/z0dlwr30n62i73434vhcha356wadq9a2-vendor-registry.drv
  /nix/store/74bnkyf08s66yz911qnnikspffjnnj5g-vendor-cargo-deps.drv
  /nix/store/k186wj9dmmv3vmia20rpdqvkcxq0cijl-harmonia-deps-3.1.0.drv
  /nix/store/5rhw4dialsk2arcz7is5v5lq1a4zspc3-harmonia-3.1.0.drv