this derivation will be built:
  /nix/store/nimskb4sw1kd4hm2q01d2py6cyhcsyyr-nix-shell.drv
building '/nix/store/nimskb4sw1kd4hm2q01d2py6cyhcsyyr-nix-shell.drv'
nix-shell> Running phase: buildPhase

upload niks3: ok