this derivation will be built:
  /nix/store/l47mb30m0wbs7sd136y3k3a1c60m7py8-interpolate-conformance.drv
building '/nix/store/l47mb30m0wbs7sd136y3k3a1c60m7py8-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok