these 2 derivations will be built:
  /nix/store/911s2n1di3gsms52kzx4icbm2lk6ynf1-flake-inputs.drv
  /nix/store/l2v9yivdiyc7xml6g123h5kwdnlg411l-check-flake-inputs.drv
building '/nix/store/911s2n1di3gsms52kzx4icbm2lk6ynf1-flake-inputs.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=22&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/911s2n1di3gsms52kzx4icbm2lk6ynf1-flake-inputs.drv' on farm.numtide.com:50051
flake-inputs> elastic-arm-9a50e053: building 911s2n1di3gsms52kzx4icbm2lk6ynf1-flake-inputs.drv
building '/nix/store/l2v9yivdiyc7xml6g123h5kwdnlg411l-check-flake-inputs.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=22&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/l2v9yivdiyc7xml6g123h5kwdnlg411l-check-flake-inputs.drv' on farm.numtide.com:50051
check-flake-inputs> elastic-arm-9a50e053: building l2v9yivdiyc7xml6g123h5kwdnlg411l-check-flake-inputs.drv