these 2 derivations will be built:
  /nix/store/5npx5zl5aw0dvckw9j2j5b18505rn531-cargo-vendor-dir.drv
  /nix/store/2qsdgppwlzf8c2349yh5hkdfv4dkm1ss-zfs-dedup-0.1.0.drv