this derivation will be built:
  /nix/store/cczhzi8q3y3z3jgz8ngc2z9z3jycfhap-instance-eval.drv
building '/nix/store/cczhzi8q3y3z3jgz8ngc2z9z3jycfhap-instance-eval.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/cczhzi8q3y3z3jgz8ngc2z9z3jycfhap-instance-eval.drv' on farm.numtide.com:50051
instance-eval> elastic-arm-e65ee682: building cczhzi8q3y3z3jgz8ngc2z9z3jycfhap-instance-eval.drv
instance-eval> structuredAttrs is enabled