this derivation will be built:
  /nix/store/7d268v4d39m14r0yrcc3j9cxq318d1jm-interpolate-conformance.drv
building '/nix/store/7d268v4d39m14r0yrcc3j9cxq318d1jm-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok