this derivation will be built:
  /nix/store/88n5nsgvh0x1ilybjw2fqazmszc5k87p-nix-shell.drv
building '/nix/store/88n5nsgvh0x1ilybjw2fqazmszc5k87p-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok