this derivation will be built:
  /nix/store/yy3lc9r91wsaqh44hv8g8n2gihy7kpy7-inputDerivation-effect-docs-pages.drv
building '/nix/store/yy3lc9r91wsaqh44hv8g8n2gihy7kpy7-inputDerivation-effect-docs-pages.drv'...