this derivation will be built:
  /nix/store/hla2p8zz7hmrfq6s1sy0wfiqwn8p6xxd-inputDerivation-effect-docs-pages.drv
building '/nix/store/hla2p8zz7hmrfq6s1sy0wfiqwn8p6xxd-inputDerivation-effect-docs-pages.drv'...