this derivation will be built:
  /nix/store/i9m1kpr8hd875h7l7ghqvsfmd6sbr2j2-interpolate-conformance.drv
building '/nix/store/i9m1kpr8hd875h7l7ghqvsfmd6sbr2j2-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok