these 3 derivations will be built:
  /nix/store/j2fx3hl3l8rj9narlsw42jx43wn0f1cx-iets-0.2.0.drv
  /nix/store/b79dbahgs1vqpwi0xffismimfv7dzh77-iets-conformance-adapter.drv
  /nix/store/1bh97d1lssmwx2334ql2il01m8zal0ja-nix-conformance-iets.drv
warning: 1bh97d1lssmwx2334ql2il01m8zal0ja-nix-conformance-iets.drv: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}, waiting up to 120s for a worker
1bh97d1lssmwx2334ql2il01m8zal0ja-nix-conformance-iets.drv: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}
error: build of '/nix/store/1bh97d1lssmwx2334ql2il01m8zal0ja-nix-conformance-iets.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=23&system=aarch64-linux' failed: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}
error: Cannot build '/nix/store/1bh97d1lssmwx2334ql2il01m8zal0ja-nix-conformance-iets.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/yr820yy8is8353f9vp8zhp7vbgiqwqcc-nix-conformance-iets