these 2 derivations will be built:
  /nix/store/2mmcr4m65yzzi7cnf96v7c196nc1f5c7-flake-inputs.drv
  /nix/store/01kywyfcg7i7f46924jv6qf03wdqyjvb-check-flake-inputs.drv
could not copy /nix/store/g8l6bzka74qi0im8mwn1cylpbbkhxlph-check-flake-inputs: error: gRPC FetchNars failed: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.2:50051: handshaker shutdown
error: some outputs are unexpectedly invalid