this derivation will be built:
  /nix/store/lf7n6pwmb1kbyp8hk020x2fy0prkw643-check-kandev.drv
building '/nix/store/lf7n6pwmb1kbyp8hk020x2fy0prkw643-check-kandev.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=22&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/lf7n6pwmb1kbyp8hk020x2fy0prkw643-check-kandev.drv' on farm.numtide.com:50051
check-kandev> mac02: building lf7n6pwmb1kbyp8hk020x2fy0prkw643-check-kandev.drv