this derivation will be built:
  /nix/store/0g7bin1j9inj4c57fhj92y3vav4a93p7-check-beads-viewer.drv
building '/nix/store/0g7bin1j9inj4c57fhj92y3vav4a93p7-check-beads-viewer.drv'

upload niks3: ok