these 3 derivations will be built:
  /nix/store/9facxllswh2h8j2d7vqk7wvm8arqsa5r-omp-18.12.4-cargo-vendor-vendor.drv
  /nix/store/n77ggrg3p294yrqvv3i9ih3092qaiybw-omp-18.12.4.drv
  /nix/store/k3n58h7l5cprf8mz9xgasra9yviv4ph2-check-omp.drv
farm.numtide.com:50051: failed to connect to all addresses; last error: UNKNOWN: ipv4:65.21.215.17:50051: tcp handshaker shutdown, retrying