these 2 derivations will be built:
  /nix/store/2lj92j1hv9y0wcyq2zn4fr5svlczhkvp-herdr-core-0.1.20.drv
  /nix/store/7zskzy6aq94sgjnidpwdlkydcqnxf1ml-check-herdr-core.drv
building '/nix/store/7zskzy6aq94sgjnidpwdlkydcqnxf1ml-check-herdr-core.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/7zskzy6aq94sgjnidpwdlkydcqnxf1ml-check-herdr-core.drv' on farm.numtide.com:50051
check-herdr-core> elastic-arm-63f8cac2: building 7zskzy6aq94sgjnidpwdlkydcqnxf1ml-check-herdr-core.drv