this derivation will be built:
  /nix/store/7sz5jjksg9qzfiizxa1z8hck2yfa2i9f-inputDerivation-effect-update-packages.drv
building '/nix/store/7sz5jjksg9qzfiizxa1z8hck2yfa2i9f-inputDerivation-effect-update-packages.drv'...