this derivation will be built:
  /nix/store/6x314ikyr6pkfc3k8ifzl7pgc3k13js8-nix-shell.drv
building '/nix/store/6x314ikyr6pkfc3k8ifzl7pgc3k13js8-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok