this derivation will be built:
  /nix/store/kq1fhwc14miy3isfbcf3n4n6wfz5g1g0-inputDerivation-effect-docs-pages.drv
building '/nix/store/kq1fhwc14miy3isfbcf3n4n6wfz5g1g0-inputDerivation-effect-docs-pages.drv'...