this derivation will be built:
  /nix/store/1p793b0hsl7akjn9kqc3rri31lgakpys-inputDerivation-effect-docs-pages.drv
building '/nix/store/1p793b0hsl7akjn9kqc3rri31lgakpys-inputDerivation-effect-docs-pages.drv'...