this derivation will be built:
  /nix/store/vax5xxb5xq5n6k5p35g2j7rfxnm15r5c-interpolate-conformance.drv
building '/nix/store/vax5xxb5xq5n6k5p35g2j7rfxnm15r5c-interpolate-conformance.drv' on 'grpc://farm.numtide.com:50051?connect-timeout=21&system=aarch64-linux&token-file=/run/nix-farm-client/farm-token'
building '/nix/store/vax5xxb5xq5n6k5p35g2j7rfxnm15r5c-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> elastic-arm-0e7eb4fa: building vax5xxb5xq5n6k5p35g2j7rfxnm15r5c-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected