this derivation will be built:
  /nix/store/42vs4j0kwxvppvmszpk05qxw14i6dg73-inputDerivation-effect-docs-pages.drv
building '/nix/store/42vs4j0kwxvppvmszpk05qxw14i6dg73-inputDerivation-effect-docs-pages.drv'...