this derivation will be built:
  /nix/store/r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv
building '/nix/store/r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=22&restart-grace=900&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv' on farm.numtide.com:50051
treefmt-check> mac02: building r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv
scheduler at farm.numtide.com:50051: Stream removed (Socket closed), reconnecting
r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv: Stream removed (Socket closed), asking the scheduler again
scheduler at farm.numtide.com:50051: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.2:50051: Failed to connect to remote host: Connection refused, reconnecting
warning: r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv: no connected, non-draining worker for system 'aarch64-darwin' offers features {}, the workers offer {}, waiting up to 900s for a worker
r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv: no healthy upstream, asking the scheduler again
building '/nix/store/r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv' on farm.numtide.com:50051
treefmt-check> mac02: building r4bm26jjv680b4pmzcf36dpw7n1c1kh7-treefmt-check.drv
treefmt-check> traversed 593 files
treefmt-check> emitted 395 files for processing
treefmt-check> formatted 395 files (0 changed) in 1.994s