these 3 derivations will be built:
  /nix/store/cfnabz1n6hwmq0i19x668n2g3fhj8lwn-serde_json-1.0.154.drv
  /nix/store/ixqnjkfim90qig4f9wlv39j39i386gv3-cargo-vendor-dir.drv
  /nix/store/3s3bby6wkps2m5jgm548l2wbirrry3z1-nix-wire-0.1.0.drv