these 2 derivations will be built:
  /nix/store/rqx96q3s2klh1lr2i2p1hldn6mxwam4a-cargo-vendor-dir.drv
  /nix/store/nrlmkiqncgfmgwvagjdkafq84b4fg16w-fast-nix-gc-proptest-0.1.0.drv
this path will be fetched (872.2 KiB download, 4.6 MiB unpacked):
  /nix/store/fwvxgrprhwpb5pcshpcsfipc307b21xp-tokio-1.53.1