this derivation will be built:
  /nix/store/3mc8qbdpbap5p2ngdq562cd5bhaf94jw-interpolate-conformance.drv
building '/nix/store/3mc8qbdpbap5p2ngdq562cd5bhaf94jw-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-linux'
farm.numtide.com:50051: upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, retrying
farm.numtide.com:50051: upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, retrying
farm.numtide.com:50051: upstream connect error or disconnect/reset before headers. reset reason: connection timeout, retrying
farm.numtide.com:50051: upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, retrying
farm.numtide.com:50051: upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, retrying
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: upstream connect error or disconnect/reset before headers. reset reason: remote connection failure
       hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
error: Cannot build '/nix/store/3mc8qbdpbap5p2ngdq562cd5bhaf94jw-interpolate-conformance.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/06x924yvbkcqfgx9jv11nc18vn6gg912-interpolate-conformance