this derivation will be built:
  /nix/store/2ydrf3g47f9q6slc9y9mr4mdk66s47cq-cargo-fmt-check.drv
building '/nix/store/2ydrf3g47f9q6slc9y9mr4mdk66s47cq-cargo-fmt-check.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-darwin'
building '/nix/store/2ydrf3g47f9q6slc9y9mr4mdk66s47cq-cargo-fmt-check.drv' on farm.numtide.com:50051
cargo-fmt-check> mac02: building 2ydrf3g47f9q6slc9y9mr4mdk66s47cq-cargo-fmt-check.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy

upload niks3: ok