this derivation will be built:
  /nix/store/gbpihxmbpg1njy0dn13in1rsj8m49025-interpolate-conformance.drv
warning: ignoring the client-specified setting 'store', because it is a restricted setting and you are not a trusted user
building '/nix/store/gbpihxmbpg1njy0dn13in1rsj8m49025-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> bld1: building gbpihxmbpg1njy0dn13in1rsj8m49025-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected