this derivation will be built:
  /nix/store/g7vj1w0fh0l2b8qy5pmnyk7n9y0vd55z-treefmt-check.drv
scheduler at farm.numtide.com:50051: no healthy upstream, reconnecting
scheduler at farm.numtide.com:50051: no healthy upstream, reconnecting
scheduler at farm.numtide.com:50051: no healthy upstream, reconnecting