this derivation will be built:
  /nix/store/15py1p2hr4di63x0ccg4bs94vm3lgil0-treefmt-check.drv
building '/nix/store/15py1p2hr4di63x0ccg4bs94vm3lgil0-treefmt-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-linux'
warning: 15py1p2hr4di63x0ccg4bs94vm3lgil0-treefmt-check.drv: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}, waiting up to 120s for a worker
15py1p2hr4di63x0ccg4bs94vm3lgil0-treefmt-check.drv: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}
error: build of '/nix/store/15py1p2hr4di63x0ccg4bs94vm3lgil0-treefmt-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-linux' failed: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}
error: Cannot build '/nix/store/15py1p2hr4di63x0ccg4bs94vm3lgil0-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/zw35qddql3qi055994kizfbxp3gl5ahn-treefmt-check