this derivation will be built:
  /nix/store/j94vnm2c51bwpb883ckwwq7aligl9fg7-instance-eval.drv
building '/nix/store/j94vnm2c51bwpb883ckwwq7aligl9fg7-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/j94vnm2c51bwpb883ckwwq7aligl9fg7-instance-eval.drv' on farm.numtide.com:50051
instance-eval> elastic-arm-e65ee682: building j94vnm2c51bwpb883ckwwq7aligl9fg7-instance-eval.drv
instance-eval> structuredAttrs is enabled
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy