this derivation will be built:
  /nix/store/g9iwik7yvidl1qhxrl18k3ac9f0x4y24-spec-rufo.drv
building '/nix/store/g9iwik7yvidl1qhxrl18k3ac9f0x4y24-spec-rufo.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/g9iwik7yvidl1qhxrl18k3ac9f0x4y24-spec-rufo.drv' on farm.numtide.com:50051
spec-rufo> elastic-arm-0b1d6a93: building g9iwik7yvidl1qhxrl18k3ac9f0x4y24-spec-rufo.drv
spec-rufo> Format: shallow/a.rb
spec-rufo> Format: deep/x/y/a.rb
spec-rufo> invalid/a.rb:1 syntax error, unexpected end-of-input
spec-rufo> invalid/a.rb:1 syntax error, unexpected end-of-input

upload niks3: ok