this derivation will be built:
  /nix/store/mdchmmxk5zpbcqrlrnw32a8n6ppdm68w-spec-dos2unix.drv
building '/nix/store/mdchmmxk5zpbcqrlrnw32a8n6ppdm68w-spec-dos2unix.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'
building '/nix/store/mdchmmxk5zpbcqrlrnw32a8n6ppdm68w-spec-dos2unix.drv' on farm.numtide.com:50051
spec-dos2unix> elastic-arm-0b1d6a93: building mdchmmxk5zpbcqrlrnw32a8n6ppdm68w-spec-dos2unix.drv
spec-dos2unix> dos2unix: converting file shallow/a.txt to Unix format...
spec-dos2unix> dos2unix: converting file deep/x/y/a.txt to Unix format...
spec-dos2unix> dos2unix: converting file shallow/a.txt to Unix format...

upload niks3: ok