this derivation will be built:
  /nix/store/0l3m3gsyz2b8f448fw3swa6mhic0p1id-interpolate-conformance.drv
building '/nix/store/0l3m3gsyz2b8f448fw3swa6mhic0p1id-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/0l3m3gsyz2b8f448fw3swa6mhic0p1id-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> elastic-arm-49e89cd6: building 0l3m3gsyz2b8f448fw3swa6mhic0p1id-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected