this derivation will be built:
  /nix/store/6gkjp9ygza884i21bz3fdhsqjic8qp3h-nix-shell.drv
building '/nix/store/6gkjp9ygza884i21bz3fdhsqjic8qp3h-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok