this derivation will be built:
  /nix/store/cb5c3vpy8w4i7gc4g9yqb5sfrp3mrcvq-interpolate-conformance.drv
building '/nix/store/cb5c3vpy8w4i7gc4g9yqb5sfrp3mrcvq-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok