these 6 derivations will be built:
  /nix/store/gdsrjyjmf69sfznirvfj980c654brpsx-cargo-package-tokio-1.53.2.drv
  /nix/store/2c16kf6gjj2ckfiqa469hdkx8syqijl0-vendor-registry.drv
  /nix/store/4vym1gac0yqdvjh9xn40djc6im16f6zy-source.drv
  /nix/store/kszmkn1kp95bvm6in6r96ia6hbkipwrb-vendor-cargo-deps.drv
  /nix/store/cshiyndrr32svzcz1n6xp4s88djs3zrz-flakelet-relay-deps-0.1.0.drv
  /nix/store/qf18cznvfgf7v1nr9gw1pp3i9lsmxfh0-flakelet-relay-0.1.0.drv
this path will be fetched (906.7 KiB download, 906.6 KiB unpacked):
  /nix/store/bcrycwlkj57cn18ad8dcbjn8xjbx3pcx-cargo-src-tokio-1.53.2