this derivation will be built:
  /nix/store/pw9b5ywmigrkgk5haxlnn232yar33ql5-interpolate-conformance.drv
building '/nix/store/pw9b5ywmigrkgk5haxlnn232yar33ql5-interpolate-conformance.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=20&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/pw9b5ywmigrkgk5haxlnn232yar33ql5-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> elastic-arm-23d67df9: building pw9b5ywmigrkgk5haxlnn232yar33ql5-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected