this derivation will be built:
  /nix/store/c2af6r777kk5lfk61a74p1lqln55g864-interpolate-conformance.drv
building '/nix/store/c2af6r777kk5lfk61a74p1lqln55g864-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok