this derivation will be built:
  /nix/store/5z9rka2992w1xv3b2flj965kmyimisw2-nix-shell.drv
building '/nix/store/5z9rka2992w1xv3b2flj965kmyimisw2-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok