this derivation will be built:
  /nix/store/1mz8n7lz4j0fxiapjq4hpj3hsd5rmf4w-check-formatelf.drv
building '/nix/store/1mz8n7lz4j0fxiapjq4hpj3hsd5rmf4w-check-formatelf.drv' on 'grpc://farm.numtide.com:50051?client-cert=/run/secrets/vars/per-machine/bld1/nix-farm-ci/crt&client-key=/run/secrets/vars/per-machine/bld1/nix-farm-ci/key&connect-timeout=20&system=aarch64-linux'
building '/nix/store/1mz8n7lz4j0fxiapjq4hpj3hsd5rmf4w-check-formatelf.drv' on farm.numtide.com:50051
check-formatelf> elastic-arm-52ccf228: building 1mz8n7lz4j0fxiapjq4hpj3hsd5rmf4w-check-formatelf.drv