this derivation will be built:
  /nix/store/s1hh96vw3xra562pvjr0hfdy771syvd0-inputDerivation-effect-docs-pages.drv
building '/nix/store/s1hh96vw3xra562pvjr0hfdy771syvd0-inputDerivation-effect-docs-pages.drv'...