this derivation will be built:
  /nix/store/ra9n0x5r4hr4mviql9gagvy9ksmg2g4a-interpolate-conformance.drv
building '/nix/store/ra9n0x5r4hr4mviql9gagvy9ksmg2g4a-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok