these 2 derivations will be built:
  /nix/store/9amzc03v8jfd0d78w1lbqpvj623x39rz-flake-inputs.drv
  /nix/store/18qd6drbgd2n8bh9g2na4lkgsa2wlpms-check-flake-inputs.drv
building '/nix/store/9amzc03v8jfd0d78w1lbqpvj623x39rz-flake-inputs.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/9amzc03v8jfd0d78w1lbqpvj623x39rz-flake-inputs.drv' on farm.numtide.com:50051
flake-inputs> elastic-arm-9a50e053: building 9amzc03v8jfd0d78w1lbqpvj623x39rz-flake-inputs.drv
building '/nix/store/18qd6drbgd2n8bh9g2na4lkgsa2wlpms-check-flake-inputs.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/18qd6drbgd2n8bh9g2na4lkgsa2wlpms-check-flake-inputs.drv' on farm.numtide.com:50051
check-flake-inputs> elastic-arm-9a50e053: building 18qd6drbgd2n8bh9g2na4lkgsa2wlpms-check-flake-inputs.drv