these 3 derivations will be built:
  /nix/store/1g1kvzam5igbnm1m1jj3c5ba85kb9bvg-iets-0.2.0.drv
  /nix/store/kvg9fygk1ygw69x0phdjcr4xdfq68syp-iets-conformance-adapter.drv
  /nix/store/458f0yh18v86328vqhi7w0s75zcd48g0-nix-conformance-iets.drv
warning: kvg9fygk1ygw69x0phdjcr4xdfq68syp-iets-conformance-adapter.drv: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}, waiting up to 120s for a worker
kvg9fygk1ygw69x0phdjcr4xdfq68syp-iets-conformance-adapter.drv: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}
error: build of '/nix/store/kvg9fygk1ygw69x0phdjcr4xdfq68syp-iets-conformance-adapter.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=21&system=aarch64-linux' failed: no connected, non-draining worker for system 'aarch64-linux' offers features {}, the workers offer {}
error: Cannot build '/nix/store/kvg9fygk1ygw69x0phdjcr4xdfq68syp-iets-conformance-adapter.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/6w3kn40nl3slccshlp74yz9x3q1zcbzc-iets-conformance-adapter
error: Cannot build '/nix/store/458f0yh18v86328vqhi7w0s75zcd48g0-nix-conformance-iets.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/y34252vk28bkixzw4iwb8dazm9r34l22-nix-conformance-iets