this derivation will be built:
  /nix/store/1prin99l4i7z985d9afy0srd1p2x6idm-interpolate-conformance.drv
building '/nix/store/1prin99l4i7z985d9afy0srd1p2x6idm-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok