these 3 derivations will be built:
  /nix/store/v5m0qqwcyz1yc7y0bcavqhpwd9v4rzr8-t3code-0.1.2.drv
  /nix/store/f7fgnkrp2larrx5r48gax6l1ypx22hc7-t3code-0.1.2.drv
  /nix/store/3xp4xxl3s28ppx86djjp0w3km8kk8zbg-check-t3code.drv
could not copy /nix/store/dh719s7vfh3q00xmcg5irw0av50wwbpb-check-t3code: error: gRPC FetchNars failed: failed to connect to all addresses; last error: UNKNOWN: ipv4:65.21.215.17:50051: tcp handshaker shutdown
error: some outputs are unexpectedly invalid