these 10 derivations will be built:
  /nix/store/9c3k1i9jhns763zbn9hm6r4g2wvfn3mn-cargo-package-tokio-1.53.3.drv
  /nix/store/lck8sr2j4wfqzp24wqy9d2r86q3s7v5z-cargo-package-rustls-0.23.46.drv
  /nix/store/rzly1adnknph88gqd7c7mff5nxcb7hpw-cargo-package-hyper-1.12.0.drv
  /nix/store/s83w9yb565cxj2kkw39cz49dlz870jpp-cargo-package-want-0.3.2.drv
  /nix/store/zz6kms1q4fzdqlli1v0xnwkvsli0z2kv-cargo-package-serde_json-1.0.154.drv
  /nix/store/a0gmmi2snq0qml49smrg1vly84ycql5h-vendor-registry.drv
  /nix/store/p02cw8qwfn4kyw1pmic9mwpppn4zn9zc-source.drv
  /nix/store/xa2cwn94w2pwfjlry2d7hz0nmrwvrwa2-vendor-cargo-deps.drv
  /nix/store/pigk43gv8rbr312vpjq5fhspamzghl00-flakelet-relay-deps-0.1.0.drv
  /nix/store/jc4h263hfrp3wpvb7h0iw2wpka94yp7k-flakelet-relay-0.1.0.drv
this path will be fetched (154.5 KiB download, 154.5 KiB unpacked):
  /nix/store/5151q4dpc9qpq03cs14bd7h8lnykfw40-cargo-src-serde_json-1.0.154