this derivation will be built:
  /nix/store/mgci9pcd8778sshjkwib2m8i6v5j0d9x-vanixiets-docs-linkcheck-0.0.0-development.drv
building '/nix/store/mgci9pcd8778sshjkwib2m8i6v5j0d9x-vanixiets-docs-linkcheck-0.0.0-development.drv' on 'grpc://[fddb:4344:343b:14b9:399:9324:19d9:3451]:50051?ca-cert=/run/nix-grpc-store/ca.crt&connect-timeout=5'
building '/nix/store/mgci9pcd8778sshjkwib2m8i6v5j0d9x-vanixiets-docs-linkcheck-0.0.0-development.drv' on [fddb:4344:343b:14b9:399:9324:19d9:3451]:50051
vanixiets-docs-linkcheck-0.0.0-development> stibnite: building mgci9pcd8778sshjkwib2m8i6v5j0d9x-vanixiets-docs-linkcheck-0.0.0-development.drv

upload niks3: ok