this derivation will be built:
  /nix/store/d1hz4pd3ckw7cnisdhmqnfyff75zg5il-interpolate-conformance.drv
building '/nix/store/d1hz4pd3ckw7cnisdhmqnfyff75zg5il-interpolate-conformance.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-darwin'
building '/nix/store/d1hz4pd3ckw7cnisdhmqnfyff75zg5il-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> mac02: building d1hz4pd3ckw7cnisdhmqnfyff75zg5il-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected
could not copy /nix/store/fqm8khark9hlxysnly0h1ypa0nmp9x7m-interpolate-conformance: error: gRPC FetchNars failed: failed to connect to all addresses; last error: UNKNOWN: ipv4:65.21.215.17:50051: connection attempt timed out before receiving SETTINGS frame
error: some outputs are unexpectedly invalid