these 3 derivations will be built:
  /nix/store/6g4iamcapwv4l3c5ingy07hiz4xc9fzi-serde_json-1.0.152.drv
  /nix/store/0nf23rrckqq6bmx936g6y0m69q73wz6z-cargo-vendor-dir.drv
  /nix/store/1wnvh2akygrkgwbpzmangr0zv767bzdz-bob-0.1.0.drv
0nf23rrckqq6bmx936g6y0m69q73wz6z-cargo-vendor-dir.drv: error: gRPC AddMultipleToStore on 'farm.numtide.com:50051' failed: Cancelling all calls
       hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
error: build of '/nix/store/0nf23rrckqq6bmx936g6y0m69q73wz6z-cargo-vendor-dir.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=20&system=aarch64-linux' failed: error: gRPC AddMultipleToStore on 'farm.numtide.com:50051' failed: Cancelling all calls
              hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
error: Cannot build '/nix/store/0nf23rrckqq6bmx936g6y0m69q73wz6z-cargo-vendor-dir.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/wxzsi55k4z9z3qxs9b79kq3k5c6mrsfa-cargo-vendor-dir
error: Cannot build '/nix/store/1wnvh2akygrkgwbpzmangr0zv767bzdz-bob-0.1.0.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/5ndrh2v25qqrfjrj5vwqlyz782kp7nl4-bob-0.1.0