this derivation will be built:
  /nix/store/f49nvbj49vsqhj9wppqhaszfav4a9pjy-interpolate-conformance.drv
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: connection timeout, retrying
error: gRPC QueryValidPaths on 'farm.numtide.com:50051' failed: upstream connect error or disconnect/reset before headers. reset reason: connection timeout
       hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
error: Cannot build '/nix/store/f49nvbj49vsqhj9wppqhaszfav4a9pjy-interpolate-conformance.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ihnxmywfwvd1fxm5fkcm68svskvzdg6m-interpolate-conformance