this derivation will be built:
  /nix/store/f7ncz1xw8a0p6fsi2g7xbky41js72sw6-interpolate-conformance.drv
building '/nix/store/f7ncz1xw8a0p6fsi2g7xbky41js72sw6-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok