this derivation will be built:
  /nix/store/08w99ph6dj66ws4wv9qcj21kjb7ckd9b-interpolate-conformance.drv
cannot build 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=22&system=aarch64-linux': error: gRPC StoreInfo on 'farm.numtide.com:50051' failed: failed to connect to all addresses; last error: UNKNOWN: ipv6:%5B2a01:4f9:3071:1fc8::1%5D:50051: handshaker shutdown
       hint: Set NIX_GRPC_DEBUG=1 for a handshake trace.
building '/nix/store/08w99ph6dj66ws4wv9qcj21kjb7ckd9b-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=21&system=aarch64-linux'
building '/nix/store/08w99ph6dj66ws4wv9qcj21kjb7ckd9b-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> elastic-arm-8f6abe2e: building 08w99ph6dj66ws4wv9qcj21kjb7ckd9b-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok