this derivation will be built:
  /nix/store/2pkz6xx8992knq75g0v5rj5r0x50vafw-interpolate-conformance.drv
building '/nix/store/2pkz6xx8992knq75g0v5rj5r0x50vafw-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok