this derivation will be built:
  /nix/store/b7h6iql2ismiabp28513fq8g65r4vy02-interpolate-conformance.drv
building '/nix/store/b7h6iql2ismiabp28513fq8g65r4vy02-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok