this derivation will be built:
  /nix/store/8sf35cxiv3n2j43jbg81lsp8d91lls77-interpolate-conformance.drv
building '/nix/store/8sf35cxiv3n2j43jbg81lsp8d91lls77-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok