these 2 derivations will be built:
  /nix/store/3bl9pcjq8gjszd3yx0s2lfqbhnfszsc9-source.drv
  /nix/store/r6gngf945zscc9ih3scgrq9lifxvz2qi-collie-1.11.0.drv
scheduler at farm.numtide.com:50051: scheduler passive, another node serves, reconnecting
scheduler at farm.numtide.com:50051: scheduler passive, another node serves, reconnecting