this derivation will be built:
  /nix/store/38wbq8q12ffr517gl53d1a9f3p7l5dx2-interpolate-conformance.drv
building '/nix/store/38wbq8q12ffr517gl53d1a9f3p7l5dx2-interpolate-conformance.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=22&restart-grace=900&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/38wbq8q12ffr517gl53d1a9f3p7l5dx2-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> elastic-arm-cc74fa0a: building 38wbq8q12ffr517gl53d1a9f3p7l5dx2-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected