these 2 derivations will be built:
  /nix/store/6v5yvfd92mhfz3agkjlvcg4mr925bfc8-claudebox.drv
  /nix/store/f9gg4wdy6pg7zqc23ns4j988y3viljwx-check-claudebox.drv
building '/nix/store/6v5yvfd92mhfz3agkjlvcg4mr925bfc8-claudebox.drv'
building '/nix/store/f9gg4wdy6pg7zqc23ns4j988y3viljwx-check-claudebox.drv'

upload niks3: ok