these 2 derivations will be built:
  /nix/store/np9nrlq1vir0cgj8r2b2h98nx9vm2dgl-iets-0.2.0.drv
  /nix/store/91kj83x5k8ny33cmvwdhi2zx3bk7lhq4-iets-classic-2.34.9.drv
building '/nix/store/91kj83x5k8ny33cmvwdhi2zx3bk7lhq4-iets-classic-2.34.9.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=22&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/91kj83x5k8ny33cmvwdhi2zx3bk7lhq4-iets-classic-2.34.9.drv' on farm.numtide.com:50051
iets-classic-2.34.9> elastic-arm-0a686c29: building 91kj83x5k8ny33cmvwdhi2zx3bk7lhq4-iets-classic-2.34.9.drv