this derivation will be built:
  /nix/store/n71y0i03b67vz0xrs0cz1vqqjqmi87xa-interpolate-conformance.drv
building '/nix/store/n71y0i03b67vz0xrs0cz1vqqjqmi87xa-interpolate-conformance.drv'
interpolate-conformance> 10 cases: Nix interpolate == Python interpolate == expected

upload niks3: ok