this derivation will be built:
  /nix/store/6gsx21sg7rss3ricyrjkdmarvah4i3fn-check-pi.drv
building '/nix/store/6gsx21sg7rss3ricyrjkdmarvah4i3fn-check-pi.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=23&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/6gsx21sg7rss3ricyrjkdmarvah4i3fn-check-pi.drv' on farm.numtide.com:50051
check-pi> mac02: building 6gsx21sg7rss3ricyrjkdmarvah4i3fn-check-pi.drv