these 2 derivations will be built:
  /nix/store/kpgzldd8f01s2lslyy3pi624la47dx2q-mcptoon-0.8.27.drv
  /nix/store/v82w0yh1rsxx992gzqwlgpv8zcflqj9v-check-mcptoon.drv
farm.numtide.com:50051: failed to connect to all addresses; last error: UNKNOWN: ipv4:65.21.215.17:50051: tcp handshaker shutdown, retrying