this derivation will be built:
  /nix/store/pvhs0k8fxdmwpfsh6b82fnif6ylz5kf3-inputDerivation-effect-docs.drv
building '/nix/store/pvhs0k8fxdmwpfsh6b82fnif6ylz5kf3-inputDerivation-effect-docs.drv'...