this derivation will be built:
  /nix/store/hwxnr1b4g1vkqra4vyj9lfvi6nk1v5jd-inputDerivation-effect-docs.drv
building '/nix/store/hwxnr1b4g1vkqra4vyj9lfvi6nk1v5jd-inputDerivation-effect-docs.drv'...