these 3 derivations will be built:
  /nix/store/5xmbm0lrq8dwz7d9v3rk6qzaj363ga9c-kandev-web-0.98.0.drv
  /nix/store/viks1l03smyvd3dgwp7vr5bkv9hlrl78-kandev-0.98.0.drv
  /nix/store/lf7n6pwmb1kbyp8hk020x2fy0prkw643-check-kandev.drv
could not copy /nix/store/v8qin4i534mmpsafzmjh5y7ydxqpxwm8-kandev-web-0.98.0: error: gRPC FetchNars failed: failed to connect to all addresses; last error: UNKNOWN: ipv4:65.21.215.17:50051: connection attempt timed out before receiving SETTINGS frame
error: some outputs are unexpectedly invalid