these 2 derivations will be built:
  /nix/store/9isvqn61ybf0wrm09iaj5ydqn91zq9yw-flake-inputs.drv
  /nix/store/x5kwybsjcaphw5pw171lq0liv4vnvmm2-check-flake-inputs.drv
building '/nix/store/9isvqn61ybf0wrm09iaj5ydqn91zq9yw-flake-inputs.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/9isvqn61ybf0wrm09iaj5ydqn91zq9yw-flake-inputs.drv' on farm.numtide.com:50051
flake-inputs> mac02: building 9isvqn61ybf0wrm09iaj5ydqn91zq9yw-flake-inputs.drv
building '/nix/store/x5kwybsjcaphw5pw171lq0liv4vnvmm2-check-flake-inputs.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&system=aarch64-darwin&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/x5kwybsjcaphw5pw171lq0liv4vnvmm2-check-flake-inputs.drv' on farm.numtide.com:50051
check-flake-inputs> mac02: building x5kwybsjcaphw5pw171lq0liv4vnvmm2-check-flake-inputs.drv