this derivation will be built:
  /nix/store/dp09abgm5h7ihq2m12cgia56kjk46fb5-spec-dockerfmt.drv
building '/nix/store/dp09abgm5h7ihq2m12cgia56kjk46fb5-spec-dockerfmt.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=22&system=aarch64-linux'
building '/nix/store/dp09abgm5h7ihq2m12cgia56kjk46fb5-spec-dockerfmt.drv' on farm.numtide.com:50051
spec-dockerfmt> elastic-arm-0b1d6a93: building dp09abgm5h7ihq2m12cgia56kjk46fb5-spec-dockerfmt.drv

upload niks3: ok