this derivation will be built:
  /nix/store/f73yy1v2s6v5m47nk3gi9qdfls542ck4-interpolate-conformance.drv
building '/nix/store/f73yy1v2s6v5m47nk3gi9qdfls542ck4-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok