this derivation will be built:
  /nix/store/k4l2y5wm1hy4vn6ikxgkfgqshjzcwdjr-inputDerivation-effect-docs.drv
building '/nix/store/k4l2y5wm1hy4vn6ikxgkfgqshjzcwdjr-inputDerivation-effect-docs.drv'...