this derivation will be built:
  /nix/store/x6jrzqqf3f1za3m3bgsyml8rrsk7rc8r-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/x6jrzqqf3f1za3m3bgsyml8rrsk7rc8r-interpolate-conformance.drv' on farm.numtide.com:50051
interpolate-conformance> bld1: building x6jrzqqf3f1za3m3bgsyml8rrsk7rc8r-interpolate-conformance.drv
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected