this derivation will be built:
  /nix/store/kll01w1xvfn1jcdbb66g3hyzmf3jcb7n-check-luvus.drv
building '/nix/store/kll01w1xvfn1jcdbb66g3hyzmf3jcb7n-check-luvus.drv'

upload niks3: ok